Thermo King 002008, Manual

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115
Electric Standby Diagnosis
Condition Possible Cause Remedy
Unit switch Off—LCD Blank Battery discharged Charge or replace battery
Faulty battery cable connections Clean battery cables
Fuse link blown
Check for short circuit and replace
fuse link
Fuse F10 blown Check for short circuits and replace
fuse
Open circuit Check 2, 2P, and 2PA circuits
Unit switch On—LCD backlight
does not come on Faulty Zone 1/Host On/Off switch Check Zone 1/Host On/Off switch
Fuse F20 or F22 blown Check for short circuit and replace
fuse
Open circuit Check 2AA, 8A, and 8 circuits
Unit switch On and LCD backlight
On but motor will not start and run Diesel/Electric switch on Diesel Place switch on Electric
Unit in NULL Check setpoint and box temperature
Faulty Diesel/Electric switch Check switch
Faulty K7 relay Check K7 relay
Fuse F6 or F2 blown
Check for short circuit and replace
fuse
Faulty HPCO Check HPCO
Open or faulty overload relay Determine cause and rest or replace
overload relay
Faulty PSM Check PSM
Faulty motor contactor Check motor contactors
Open circuit Check 8E, 7K, 7K1, 7E, 7EA, 7EHA,
7EH, 7EB, 7EC, CH, L1, L2, and L3
circuits
Faulty drive motor Check drive motor
Faulty electric standby power source Check electric standby power source
Evaporator heaters do not heat
Fuse F1 or F14 blown
Check for short circuit and replace
fuse
Faulty heater contactor Check heater contactor
Open circuit
Check 7EH, 26E, 26E2, 26E3, L1,
L2, L3, BRN, BLU and BLK circuits
Faulty heaters Check heaters