TK 55032-18-OP-EN
31
Alarm Code Descriptions
Table 1.
Color Code Definitions
OK TO RUN
CHECK AS SPECIFIED
TAKE IMMEDIATE ACTION
Alarm
Description
Manual Start
bAt
Low Battery Voltage
- Check vehicle battery.
Auto Start
HP
High Pressure Alarm
- The system has detected excessively high
discharge pressure.
If the problem persists when the unit is restarted, contact your Thermo
King Dealer.
LP
Low Pressure Alarm
- The system has detected excessively low
suction pressure.
If the problem persists when the unit is restarted, contact your Thermo
King Dealer.
PSE
High Pressure Sensor Failure
- The high pressure sensor has
become faulty or disconnected.
Contact your Thermo King Dealer.
dr1, dr2
Cargo Doors Are Open (Units with door switch option only)
-
Check if the Doors are open. if not, then the door switches are faulty, or
improper door switch configuration.
Contact your Thermo King Dealer.
tCO
Control Module Overheating
If the problem persists when the unit is restarted, contact your Thermo
King Dealer.
SOF
Software Failure
Contact your Thermo King Dealer.
P1E
Faulty Cargo Box Return Air Temperature Sensor
- Faulty or
disconnected return air temperature sensor.
Contact your Thermo King Dealer.
P2E
Remote Cargo Box Return Air Temperature Reading Error (open
circuit or short-circuit)
Contact your Thermo King Dealer.
