Table of Contents
The Passport-II Control unit is designed for use with Direct Expansion Reverse Cycle Marine Air Conditioning Systems. The control operates on 115 or 230 volt AC power, 50 or 60 Hz. The system provides optimum control and cabin comfort by incorporating the following features:
Low Voltage Display Panel
LED Cabin Temperature Display… Fahrenheit or Celsius
Face Plate Air Sensor For Accurate Temperature Control
Programmable Multiple Fan Speed Selections
User Selected Programs For Optimum Control
High and Low Freon Pressure Inputs
Moisture Mode Cycle For Humidity Control
Anti Icing Cycle to Prevent Evaporator Icing
Multiple Compressor Staging Delay
Dual AC Voltage Input… 115 or 220 VAC
Outside Air Temperature Sensor
Alternate Air Temperature Sensor
This manual is intended to provide information necessary to insure proper installation and operation of the PASSPORT-II. Improper installation or misunderstood operating procedures can result in unsatisfactory performance and or premature failure of the controller.
Before Proceeding Read This Manual Completely
If assistance is required prior to or during the installation call Marine Air Systems at 954-973-2477 or send Fax to 954-979-4414.
The PASSPORT-II is covered under existing Marine Air Systems Warranty Policy. Neglect and system abuse are not covered under the implied or stated warranty policy.
In the interest of product improvement, Marine Air Systems' specifications and design are subject to change without prior notice.
Passport-II is a programmable, user friendly, easy to use, temperature control.
Press the ON/OFF button once to engage the system. The display indicates room temperature when the system is on and the display is blank when the system is off.
Set the desired room temperature by pressing the up or down button. The set point can be viewed at any time by momentarily pressing and releasing the up or down button.
Select automatic or any one of six fan speeds by pressing the fan button. The fan starts in automatic which is indicated by "A" in the display. Press and hold the fan button and the control will scroll through the available fan speeds, i.e., A, 1, 2, 3, 4, 5, 6 and return to automatic. Release the button at the desired setting and the fan will operate at that speed. The fan LED is lit when a manual fan speed has been selected and the fan LED is off when automatic fan operation has been chosen.
An "A" in the display indicates automatic fan operation has been selected and the fan will operate in conjunction with room temperature. The further the room temperature is from set point, the faster the fan will run while in the cooling mode. The fan speed will gradually decrease as the set point is approached and will run at low speed when set point is satisfied. The automatic fan speed operation is reversed in the heating mode. Fan speed is increased as set point is approached, however, the fan runs at low speed, once the set point is reached.
The fan can be programmed to cycle on and off with demand, allowing fan operation only when cooling or heating is required. Normally, the automatic fan speed operation is reversed in the heating mode, however, the fan can be programmed to operate the same as in the cooling mode.
Normal heating or cooling cycle
When heating or cooling is called for the valve toggles to the opposite mode (unless the compressor has been off for 75 seconds), the compressor cycles on and 4 seconds later the automatic fan adjusts to the proper speed. When the demand is satisfied, the compressor cycles off and the fan returns to low speed.
While in a given mode the controller will maintain a two degrees Fahrenheit (2 °F) temperature variation. A four degree swing is required to cause the unit to shift to the opposite mode. Once in a given mode, heating or cooling, Passport-II will maintain a two degree hysteresis. Passport-II can be programmed for automatic operation, i.e. heating or cooling on demand, cooling only or heating only.
Reversing valve operation
The reversing valve is toggled to the opposite mode when heating or cooling is required to reduce compressor start surge. The valve will only toggle when the system has been off for less than seventy-five (75) seconds. The valve will also toggle if a cycle is interrupted at the display panel by pressing the power button ON/OFF, or changing the set point. Unnecessary valve toggling has been limited to reduce noise. Valve toggling can be eliminated by programming the compressor delay at 75 seconds or more. Power on reset, will always initiate a valve toggle since no timer is running when the AC power is off.
PASSPORT-II has a memory chip which requires no batteries or backup power. When AC power is lost all operating parameters are retained indefinitely. When AC power is restored, the control resumes operating as last programmed.
Please refer to figure 1, below, for location of the buttons and displays listed on the following pages.
1. POWER BUTTON The power button is used to toggle between the on and off modes. Press and hold the power button while in the off mode to enter the program mode. Press and hold the power button for ten seconds to reset the factory default program parameters. The power and down buttons are used to unlock the program values and allow programming changes while in the programming mode.
2. FAN SPEED BUTTON The fan speed button is used to select one of the six manual or automatic fan speed settings. The automatic fan mode controls fan speed according to the difference between set point and room temperature. The greater the difference, the faster the fan will run unless the system is programmed for reverse fan operation in the heating mode. The fan button is used with the down button to blank the display for nighttime operation.
3. MANUAL FAN SPEED LED The manual fan speed indicator LED will be lit when a manual fan speed has been selected. The fan speed indicator is also lit when the fan is operated in the circulation mode only.
4. DOWN BUTTON Momentarily press and release the down button and the set point temperature will appear in the display. Press and hold the down button and the set point will begin to decrease, slowly at first, then faster as the button remains depressed. The lowest set point allowed is 60° Fahrenheit which is where the display will stop. The down button is also used in conjunction with the fan button to blank the display making night time operation less obtrusive. The down button is also used to change programmable parameters in the program mode.
5. Up Button Momentarily press the up button and the set point will appear in the temperature display. Press and hold the up button and the set point will increase, slowly at first, then faster as the button remains depressed. The highest set point allowed is 85° F which is where the display will stop no matter how long the button is held down. The up button is also used to change programmable parameters in the program mode.
6. HEAT MODE LED The heat mode LED indicator will be lit when the system is calling for heating and the compressor is running. The heat mode LED is also lit when electric heat is installed and heating is required.
7. THREE DIGIT SEVEN SEGMENT DISPLAY The inside air temperature is displayed in the window whenever the control is turned on. The three digit 7 segment display provides a readout of the inside air temperature as detected by the inside air sensor (located on the face plate unless the alternate air sensor is installed).
The display provides program information, fault codes, depending on the mode selected by the user and outside air temperature when the optional outside air sensor is installed.
The three digit display also indicates set point when either the up or down buttons are momentarily pressed.
8. COOL MODE LED The cool mode indicator LED will be lit when cooling is called for and the compressor is running. When cooling only is selected the cool LED turns on and off with the compressor.
When the control resumes operation after a power interruption all the display LEDs will turn on for one second. This is a normal operating condition and is referred to as "Power On Reset".
Single Button Functions
1 - Turn the system on and off and enter the program mode.
2 - Exit the program mode.
3 - Hold down while turning on AC power to enter the Self Test Mode.
4 - Select automatic or manual fan operation and select manual speed.
5 - Advance to the next parameter in the program mode.
6 - Hold down while turning on AC power to view the Service History.
7 - View the set point and raise the set point.
8 - Advance data values in the program mode.
9 - Move forward through the service log.
10 - View the set point and lower the set point.
11 - Reduce data values in the program mode.
12 - Move back through the service log.
13 - Hold down while turning on AC power to view the Hour Meter.
Up and Down Buttons
14 - View the outside air temperature.
15 - Save new defaults when exiting the program mode.
Power and Down Buttons
16 - Enter the humidity mode while the control is in the on mode.
17 - Unlock the program parameters while in the program mode.
Fan and Down Buttons
18 - Blank the display during night time operation.
1. Up & Down Buttons… Press the up and down buttons together and the outside air temperature will be displayed, providing the optional outside air temperature sensor has been installed… No programming is required. The outside air temperature can only be viewed when the control is in the on mode. Press the UP & Down Buttons… simultaneously, while in the program mode, to set new custom programming defaults.
3. Fan & Down Buttons… Press the fan and down buttons simultaneously to blank the display for night time operation. While the display is blanked, the heating or cooling mode LED will remain lit indicating proper system operation. When the control is satisfied the middle segment of the three digit display remains lit indicating the system is operational. Pressing any button returns the display to normal operation.
4. Power & Down Buttons… While in the on mode, press the power and the down buttons together to enter the moisture control mode. Once in the moisture mode, the display will indicate HU-1. Pressing the power button once returns the control to the off mode.
5. Power & Down Buttons in Program Mode… Press the power and down button after entering the program mode to unlock the programming values and allow program changes. This feature prevents accidental programming changes should someone access the program mode by mistake.
Important … While in the Blank Display Mode, the center segment of the temperature display remains " ON " when no heating or cooling is called for indicating the control is operational.
Off Mode: When the Passport-II is in the off mode, all control outputs are turned off. Program parameters and user settings are saved in nonvolatile memory. The program mode can only be accessed from the off mode.
On Mode: When the control is in the on mode, power will be supplied to the appropriate control outputs and the display will indicate the current state of operation. The operating and program parameters resume based on those stored the last time the unit was operating.
Cool Only Mode
When PASSPORT-II is configured for the cooling only mode, only the cooling systems will be selected and operated as required. When the temperature drops below the set point, the system will not automatically switch to the heating mode. Cooling only is supplied for systems without reverse cycle heating, however, an electric heater can be installed should heating be required.
Heating Mode Only
When the control is programed for the heating only mode, only the heating systems will be selected and operated as required. Should the temperature rise above the set point, the system will not automatically switch to the cooling mode. Heating only is supplied for circumstances that require the system to not automatically switch from the heating mode to the cooling mode.
When PASSPORT-II is configured for the automatic mode, both heating and cooling will be supplied as required. The heat and cool LED indicators will be lit according to which mode is required. The heat and cool LED follow the compressor operation, i.e. on when the compressor is on and off when the compressor is off. Temperature hysteresis in a given mode will be maintained at two degrees (2° F) Fahrenheit, however, a four degree difference is required to allow the control to change modes. Once in a new mode, the hysteresis will remain at two degrees (2° F) Fahrenheit.
While in the on mode, press the power and the down buttons simultaneously to enter the humidity or moisture control mode. The characters "HU-1" appear in the temperature display indicating successful entry.
The first cycle starts in 1 minute. The fan is started and air circulated for thirty (30) minutes. During this time the air temperature is sampled and entered into memory.
|The cooling cycle is started and continues until the temperature is
lowered two (2) °F. The compressor is allowed a maximum of one hour
running time to reach the desired temperature. Four (4) hours after the
temperature is satisfied or the compressor times out, the cycle is
repeated. During the humidity cycle the cool LED is lit while the
compressor is running.
The humidity mode is provided to maintain a specific temperature and humidity range when the yacht is unoccupied for extended periods of time.
Exit the Humidity Mode to the Off Mode by pressing the Power Button once.
Please Note: The humidity mode can ONLY be entered from the ON mode.
Automatic Fan Mode
Passport-II has six automatic fan speeds available. Speed six is high, three is medium and one is low or the slowest speed. Press and hold the fan button until the letter "A" appears in the temperature display window. Please note that when the fan LED is off, automatic fan operation has been selected. Automatic fan mode allows Passport-II to determine the fan speeds based on room temperature. The closer the room temperature is to the set point, the slower the fan will run. This permits a balance between the most efficient temperature control and slower, quieter fan speeds. Automatic fan operation is the factory default, however, manual fan speed control is available.
Manual Fan Mode
Press and hold the fan button during normal operation to select one of the six (6) manual fan speeds available. Six (6) is the fastest and one (1) represents the slowest fan speed. Manual fan mode allows the user to select the desired fan speed manually. When a manual fan speed has been selected, the fan LED will be lit. Manual fan mode is sometimes preferred when room temperature is constantly changing due to varying heat loads.
When the system is off at the display panel the fan can be used to only circulate the air. Press and hold the fan button when the display is off until the desired speed number appears in the window. Release the fan button and the fan will run at the selected speed circulating the air without heating or cooling. Press the power button once to cancel the circulation mode and enter the on mode.
High and Low Fan Limits - Fan speeds can be further tailored to suit the user by adjusting the high and low fan limits. See programming modes U 2 and U 3.
Program Mode Overview
The program mode is used to adjust the systems operating parameters to suit the particular needs of individual users. The program mode is also used to tailor the air-conditioning system for most efficient operation within an installation. Installation variables such as ducting, sensor location and system layout effect the perceived operation of the overall system. The program mode allows the system to operate as efficiently as possible within a given installation. PASSPORT-II is shipped with factory programmable default settings which are stored in permanent memory and can be recalled at any time.
Severe electrical disturbances can sometimes upset the PASSPORT-II operating sequences. Operator confusion related to program parameters can also cause, what seem to be, operational problems. Whenever there is any doubt as to the proper operation of the controller, Factory Default Parameters should be Re-initialized.
The program mode can only be entered from the off mode. From the off mode, press and hold the power button for five (5) seconds until a "U" appears in the display. Release the power button and the characters "U 1" followed by the parameter setting, appear in the display. The PASSPORT-II control is now in the program mode. Exit the program mode, to the off mode, by pressing and releasing the power button.
NOTE: The control will exit the program mode and return to the off mode if no programming is attempted for one (1) minute.
Restore Factory Default Settings
IMPORTANT ! Factory default settings can re restored by pressing and holding the power button for ten (10) seconds while the control is in the off mode. Five (5) seconds after the power button is pressed, the letter "U" appears in the display window. After ten (10) seconds a software revision number, such as ("A.10") appears, indicating re-initialization has been completed. Release the power button and the Passport-II control will return to the off mode with the factory default settings restored.
Increment from one program parameter to the next by pressing the fan button while in the program mode. Press and hold the fan button for a moment, then release the button when the desired parameter appears in the display. Press and hold the fan button to scroll through the program parameters. The programmable parameters range from "U-1" through "U-15" for direct expansion air-conditioning systems.
NOTE: Before you can alter any of the programming parameters, you must first unlock the program mode. Simultaneously pressing the power and down buttons, while you are in the program mode, unlocks the programming parameters.
The Up and Down Buttons
The up and down buttons are used to select the data or set the desired limits for the parameter being programmed. This method is followed throughout the program mode, however, special instructions are included for individual functions that require them.
Exiting the Program Mode
There are two methods to exit the program mode. Press the power button and the PASSPORT-II control will return to the off mode. Not pressing any buttons or attempting any program changes for sixty (60) seconds will cause the control to exit the program mode to the off mode. Any programming changes that were made while in the program mode will be memorized and put into operation when the mode is exited and the control is returned to the on mode.
The software version of the control is identified for one (1) second prior to the exit from the program mode. The software identification number, i.e. ("A.10") will appear in the display for one second, then the control will return to the off mode.
Should there be any reason to contact Marine Air Systems about the system or programming the PASSPORT-II, be sure to have the software identification number available.
Button Functions are Not instantaneous as in pressing keys of a typewriter. When using the control press and hold the button for an instant before releasing. Follow specific button instructions closely, where such instructions are given.
U-1: Operating Mode
The operating mode is used to select heating only, cooling only or automatic mode depending on the particular requirement. Zero (0) selects the automatic mode, one (1) selects cooling only and two (2) selects heating only. Example: A system that does not have heating capabilities should be programmed for cooling only. The factory default is zero (0) — automatic heating or cooling mode.
There are twelve (12) programmable parameters with their Factory Default Settings listed in this section. The table below indicates what these parameters are, along with the permitted values and Factory Default Settings.
Should any programming problems or confusion occur, reset the Factory Default Settings by pressing and holding the Power Button while in the Off Mode for ten (10) seconds.
The high fan speed limit can be tuned for various motors. The high fan limit is adjusted with the system operating. The range of values are 56 through 85 arbitrary units. Setting a higher number, results in a higher fan speed, setting a lower number, lowers high fan speed. Use the up and down buttons to select the desired high fan speed. The factory default setting is eighty-five (85).
The low fan limit determines the lowest output allowed for the low fan speed. The range of values for the low fan speeds are 30 through 55, in arbitrary units. The factory default setting is 50.
NOTE ! Both the high and low fan limits can be adjusted while the fan is operating. From the off mode, start the fan by pressing and holding the fan button. Continue to hold the button until a one (1) appears in the display. This is the fan circulation mode only, fan speed one (1). Enter the program mode while the fan is running and select "U-3", the low fan limit adjustment. Raising and lowering the low fan limit allows the programmer to experience the fan speed changes as they are made.
Adjust the high fan limit while the fan is running by selecting speed 6 and using parameter "U - 2" instead of "U-3". IMPORTANT ! Once the high and low fan speed limits are set, the unit will automatically adjust the remaining fan speeds for 6 equally spaced speeds.
The compressor staging delay is provided for installations where more than one system operates on the same power source. Setting the staging delays at different intervals allows only one compressor to start at a time. The units should be staged at least 5 seconds apart. The minimum delay is 5 seconds and the maximum is 135 seconds. The Factory Default is 15 seconds.
U-5: Temperature Calibration
Use this feature to calibrate the air sensor within a range of ± ten (10) °F. Enter the program mode and the offset will be displayed. Use the up and down keys to select the desired offset. The factory default setting is zero.
The system can be configured for one of four fail-safe levels. Level zero (0) turns off all fail-safe protection and mnemonic display codes. Level one (1) shuts down the system, allows the system to restart after a 90 second delay and displays no failure code. Level two (2) shuts down the system allows continual restarts after the 90 second delay and displays the appropriate mnemonic failure code. Level three (3) operates the same as level two with the addition of a system shutdown after three (3) consecutive failures… Manual reset required to restart the system.
The unit can be programmed to display either Fahrenheit or Celsius. Programming zero (0) selects degrees Fahrenheit and selecting one (1) displays degrees Celsius… The factory default setting is zero (0), degrees Fahrenheit. When degrees Celsius (°C) is selected the readings are displayed in tenths, i.e. 22.2° Celsius which represents room temperature.
During normal operation, in both the heating and cooling modes, the automatic fan speeds are reduced as the set point is approached. During heating, this is not always the preferred method of operation. Some customers prefer that the fan run faster as the set point is approached. Lower fan speeds at cooler temperatures help increase head pressure and make the air seem warmer. This method also reduces head pressure as the set-point is approached by increasing air flow across the coil. Program one (1) if you wish to reverse fan speeds during heating… The factory default setting is one (1), reversed fan operation.
The fan can be programmed to run continuously when the system is on or can be allowed to cycle with the compressor. When cycled with the compressor, the fan will operate only when heating or cooling is called for. To cycle the fan with the compressor program zero (0). To operate the fan continuously, select one (1). The factory default is one (1) which allows continuous fan operation while the system is on.
U-11: Reverse Cycle or Electric Heat
Units not equipped with reverse cycle heat may have after market electric heaters added. Electric heat requires the compressor be turned off when heating is called for. The reversing valve output is used to control the optional electric heating element contactor. The valve output relay can only carry 6 amps, therefore, a heavy duty contactor must be installed to carry the heater current. Program one (1) for the electric heat option. The factory default is zero (0) which is reverse cycle heating.
U-12: Fan Motor Selection
There are two basic fan motor types, shaded pole and split capacitor. Each motor reacts differently to speed control and each motor requires different timing for optimum speed control. The default setting is zero (0) which selects shaded pole, however, one (1) should be selected if a split cap fan motor is used in the system. Most direct expansion systems are supplied with shaded pole type fan motors.
Passport-II is equipped with a De-Icing Cycle to prevent ice build up on the evaporator coil during extended periods of cooling operation. Installation variables such as grille sizes, length of ducting, insulation R factors and ambient temperatures determine the cooling run time required to achieve set point. Customer usage may substantially increase run times by operating the system with the hatches and doors open. Programming unrealistic set point [60° F] and leaving the salon door open will usually cause the evaporator to ice up on warm muggy days.
De-Icing is accomplished by switching the reversing valve into the Heat Mode while the system is cooling. The valve will remain energized for the programmed cycle time. The cycle is programmable from OFF through a period of three  minutes. The factory default setting Off [O].
The systems program parameters cannot be altered without first unlocking the program mode. Defeat the program lock by simultaneously pressing and releasing the power and down buttons after entering the program mode. The program lock is provided to prevent accidental parameter value changes by someone unknowingly stumbling into the program mode.
Once the desired programming changes have been made and the system tests satisfactorily, your work can be saved as the new factory defaults. Your new defaults are initiated by simultaneously pressing and releasing the up and down buttons prior to exiting the program mode. New defaults can be initialized at any time by entering the program mode and following the above instructions. Once new defaults have been initialized the control will revert back to the new defaults whenever factory defaults are restored as described on pages 9 and 11 of this manual.
Several features are both hardware and software configured. The optional item is plugged into the board, the appropriate jumper selected, the program parameter set and the system recognizes the option on power-up.
When this option is installed, the outside air sensor is plugged into the outside air sensor jack (J-3) and the feature is ready for use. The outside air temperature can be viewed, during normal operation, by simultaneously pressing the up and down buttons. Passport-II units manufactured after February, 1996 will have the outside air sensor option.
Provisions are made for an alternate air sensor should installation restrictions not allow the use of the standard face plate air sensor. Install the alternate air sensor plug in the jack marked J-2 located on the module board and fasten the sensor in the return air stream. The control will automatically recognize the alternate air sensor and no further programming is required.
High and Low Freon Pressure Inputs
A three pin Molex jack (JP-1) is supplied on the main board for high and low Freon Pressure Inputs. One jumper, ( JMP-1… Low Freon Pressure ), is used to emulate the switch when it is not installed. Cut JMP-1 when the low pressure switch is installed. Cutting jumper JMP-1 when the low pressure switch is installed automatically configures the system to monitor the low pressure input, and eliminates the need for any further programming.
When a fault is detected Passport-II will display one of the following Mnemonic fault codes:
HHH… indicates high Freon pressure. 15 Second Delay… Ignored in Heat Mode.
PPP… Indicates low Freon pressure. Compressor will not restart until the fault is cleared.
AAA… Indicates failed air sensor. Unit will not run until repaired.
There are four levels of fail-safe protection including the fail-safe off mode. Level one monitors the sensors, takes appropriate action and allows continuous restarts after a 90 second delay… Does not display the fault code. Level two works the same as level one, however, the appropriate fault code mnemonic is displayed during the time-out between recycles. Level three is identical to level two with the inclusion of a three successive failures lockout routine. After three consecutive failures the system is shut down and a manual reset is required.
Lock out occurs if U-6 is programmed for level 3 and three consecutive faults are detected within a heating or cooling cycle. Lockout causes the system to shut down and flashed the fault code in the display. Lockout can only be cleared by turning the unit off and on using the power button.
When a fault occurs the appropriate mnemonic code is flashed in the display. The flashing mnemonic can be removed from the display by pressing and releasing the power button to reset the control. Resetting the control does not solve the problem that caused the fault!
The Passport-II software contains a self-test program to facilitate factory testing of the entire air-conditioning system. Once the self-test mode is activated, the test cycle will continue until the AC power is interrupted or the power button is pressed once which returns the system to the off mode.
Activate the self-test by pressing and holding the power button while turning on the AC power. Be sure to continue to hold the button until the reset is completed. Passport-II is now in the self-test mode.
Once activated the self-test software will continuously execute the following procedure:
1 - Turn on in the heat mode and supply heating for ten (10) minutes.
2 - Stop heating and run the fan only for five (5) minutes.
3 - Switch to cooling and continue cooling for ten (10) minutes.
4 - Stop cooling and run the fan only for five (5) minutes.
5 - Return to step one (1) and continue until interrupted.
The test mode will continue until the power is interrupted or the test is halted by pressing the power button once.
Set Point Range 60°F to 85°F [15.6 to -29.4° C]
Temperature Range Displayed O°F to 150°F [-17.8 to 65.6° C]
Sensor Accuracy ±2°F at 77°F
Low Voltage Limit 115 volt units 75 VAC
Low Voltage Limit 220 volt units 175 VAC
Low Voltage Processor Reset 60VAC
Line Voltage 115 Through 240 VAC
Hertz 50 or 60 Hz
Fan Output 12 Amps at 220 VAC
Valve or Heater Output 6 Amps at 220 VAC
Compressor Output 20 Amps at 220 VAC
Minimum / Maximum Operating Temperature 0° F to 180° F
Power Consumption Less Than 5 Watts
Display Panel Width 3.830" X 4.50" Panel Cut Out Width 3.375" X Height 2.775"
Maximum length of display cable is fifty (50) feet. Sensor cable lengths should be limited to 50 feet. The outside air sensor and alternate air sensor are optional items and are not included with the standard control package.
1. Ambient or Inside Air Temperature
>2. Alternate Inside Air Temperature Sensor (Optional)
3. Outside Air Temperature Sensor (Optional)
4. High Freon Pressure
5. Low Freon Pressure
Total compressor cycle time is saved in EEPROM every 6 minutes of continuous compressor running time. Cycles less than 6 minutes will be discarded to conserve memory and allow the most flexible hour-meter possible.
To view the hour meter turn off the power at the AC breaker and hold the down button depressed. While depressing the down button, restore AC power. After the power on reset routine is complete, the following will appear in the display:
1. The thousands units of the hour meter are displayed for 3 seconds.
2. The display blanks out for one second.
3. The hundreds and the tenths units are displayed for 3 seconds.
4. The unit returns to the last operating state before power was removed.
Maximum recorded time is 10, 000 hours. The hour meter stops at maximum (10,000 hrs) and can only be reset by Marine Air Systems.
Passport-II will record and remember the last eight (8) service problems or service faults detected. Each time a fault is detected, a one hour timer is started. During that hour the same or recurring fault will not be recorded. Should a different fault be detected during that hour, it will be entered into the service history log.
The following events are entered into the service history log:
1. High Freon Pressure
2. Low Freon Pressure
3. Air Sensor Fault
To view the service log turn off the AC power and depress the fan button. With the fan button depressed turn on the AC power. Once the power on reset is completed the display will flash the most recent mnemonic of the fault detected followed by the event number. To view the other events detected press either the up or down buttons.
To exit the service history log press the power button or wait 30 seconds without pressing any buttons.
The service log can be cleared by simultaneously pressing the power and down buttons while you are in the view service log mode.
Copyright © 1995 Micro Air Corporation, All Rights Reserved
No part of this publication may be reproduced, translated, stored in a retrieval system, or transmitted on any form or by means electronic, mechanical, photocopying, recording or otherwise without prior written consent by Micro Air, Inc.
Every precaution has been taken in the preparation of this manual to insure its accuracy. However, Micro Air Corporation assumes no responsibility for errors and omissions. Neither is any liability assumed for damages resulting from the use of this product and information contained herein.