Passport I/O Control Operations Manual Service Utilities
L-2231 ENGLISH 17
1. Turn on Heat Mode and supply heating for ten minutes.
2. Stop heating and run only the fan for five minutes.
3. Switch to Cool Mode and continue cooling for ten minutes.
4. Stop cooling and run only the fan for five minutes.
5. Return to step one and repeat procedure until interrupted.
To halt the self-test program, press the Power button once or interrupt the flow of AC power.
SERVICE UTILITIES
HOUR METER
The Hour Meter provides a way to judge a compressor’s longevity based on actual run time. Total compressor-cycle time is
saved in EEPROM every six minutes of continuous compressor running time. Cycle times of less than six minutes are discarded
to conserve memory and allow the most flexible Hour Meter possible.
To view the Hour Meter, disconnect AC power then press the Down button. While holding the Down button, restore AC power.
After Power-On Reset is complete (the display indicates “888” and all LEDs are lit), the following Hour Meter information
appears in the display:
1. “Hr” displays for one second.
2. The display blanks out for one second then displays for three seconds a two-digit number representing thousands of
hours. (For example, a display of “02” equals 2,000 hours.)
3. The display blanks out for one second then displays for three seconds a three-digit number representing hundreds,
tens, and ones of hours. (For example, a display of “163” equals 163 hours. Combined with the example above, the
complete Hour Meter reading is 2,163 hours.)
4. The display returns to its last operating state before power was removed.
Maximum recordable time is 65,536 hours, at which point the meter stops and can only be reset by a service technician.
SERVICE HISTORY LOG
The control records and remembers the eight most recent faults. Each time a fault is detected, a one-hour timer starts. Three
consecutive faults within that hour cause system shut down, lockout, and the fault code displays.
The following events are entered into the service history log:
• High Refrigerant Pressure (HPF)
• Low Refrigerant Pressure (LPF)
• Air Sensor Failure (ASF)
• Low AC Voltage (LAC)
• Pump or Loss of Seawater (PLF)
During the timed hour, to conserve memory, recurring faults of the same type are not recorded in the service history log.
Continuous operation for one hour without the same recurring fault clears that fault counter, but the event remains in the service
history log until overwritten. If a different fault is detected during the hour, it is also entered into the service history log.
• To view the service history log, disconnect AC power then press the Fan button. With the Fan button pressed,
restore AC power. When Power-On Reset is complete (the display indicates “888” and all LEDs are lit), release the
Fan button. The display flashes the most recently detected fault, followed by the event chronology number. To view
other detected events, press the Up button or the Down buttons.
• To clear the service history log, simultaneously press the Power and Down buttons.
• To exit the service history log, press the Power button or wait thirty seconds without pressing any button.
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