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TK 61651-18-OP-EN
Alarm Code Descriptions DSR
Alarm Description
Manual Start
OL Electric Motor Overload (Electric standby models only) - The
electric motor overload relay has tripped due to excessive current draw.
If the problem persists when the unit is restarted, contact your Thermo
King Dealer.
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) - Doors
are open, faulty door switches, 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.
C Communications Failure
Contact your Thermo King Dealer.
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