Cooling system diagnosis, troubleshooting

AD83.65-D-5000A

Cooling system diagnosis, troubleshooting

26.1.04

Cooling system diagnosis, previous knowledge

AD83.65-D-2000A



Ignition: OFF

Error with fault code

Display in operating unit

AD83.65-D-4000A

Fault text

Possible cause/note

Remedy

Cooling system operating unit, temperature display flashing

Cargo not sufficiently pre-cooled

Ambient temperature too high.

Cooling system malfunctioning

Check wiring, connectors and voltage supply of all components

Cooling system faulty

Replace cooling system

Evaporator fan nonfunctional

Evaporator fan voltage supply interrupted

Check wiring and connectors

Evaporator fan motor faulty

Replace evaporator fan

Condenser fan nonfunctional

Condenser fan voltage supply interrupted

Check wiring and connectors

Condenser fan motor faulty

Replace condenser fan

Refrigerant compressor nonfunctional

V-belt slipping

Tension V-belt and replace if necessary

V-belt damaged or torn

Replace V-belt

Compressor clutch actuation

Check wiring and connectors

Refrigerant compressor motor faulty

check, replace if necessary

Refrigerant compressor faulty

Replace cooling system

Refrigerant compressor motor nonfunctional

Voltage supply interrupted

Check wires and electrical connections

Load relay faulty

Replace load relay

Carbon brushes worn

Replace carbon brushes

Motor faulty

Replace motor

Cooling system operating unit nonfunctional

Cooling system, main fuse 100 A triggered

 Cooling in driving mode

Check main fuse, replace if necessary

Stationary refrigeration, main fuse 100 A triggered

 with stationary refrigeration code ZQ1

Check main fuse, replace if necessary

Refrigeration voltage supply interrupted

Check voltage supply wiring and connections

Connection to cooling system control unit interrupted

Check wiring and connectors

Operating unit faulty

Replace operating unit

Cooling system control unit faulty

Replace control unit

Automatic defroster nonfunctional

Start manual defrosting

 Starts defrosting

Replace control unit

 Does not start defrosting

Check wiring and connections

Replace control unit

Replace cooling system

Battery voltage too low, cooling system cannot be switched on

Voltage supply to cooling system control unit interrupted

 Battery voltage 10.7 V

 Check wiring and connectors

 Check battery (or batteries), charge

Cooling system undervoltage protection in cooling system control unit faulty

Replace control unit

Battery (or batteries) defective

Check battery (or batteries) and replace if necessary

Load compartment doors difficult to close

Voltage supply to control electronics of load compartment venting actuator motor interrupted

 Overpressure builds up in load compartment when doors are closed

Check wiring and connectors

Voltage supply from control electronics to load compartment venting actuator motor interrupted

 Replace control electronics

 Change actuator motor relay

Load compartment venting actuator motor faulty

Replace actuator motor

Stationary refrigeration not working, refrigeration in driving mode OK

230 V voltage supply not present at stationary refrigeration power pack

 with stationary refrigeration code ZQ1

 Check connection to mains power supply

 Check position of stationary refrigeration switch

Fuse has triggered

 Check mains fuse

 Check 230 V/16 A circuit breaker of stationary refrigeration

 Check power supply circuit breaker of stationary refrigeration

 Check 100 A fuse of stationary refrigeration

Check wiring and connections of stationary refrigeration

Check wiring and connections

Stationary refrigeration relay defective

Check relay, replace if necessary

stationary refrigeration power pack faulty

Replace power pack

Stationary refrigeration power supply unit fuse

Stationary refrigeration power supply unit fuse has triggered

 with stationary refrigeration code ZQ1

 Check fuse

 Check cool air supply to power supply unit

Power supply defective

Replace power supply unit

Condensation dripping from evaporator paneling into load compartment

Condensation drain clogged

Blow through condensation hoses from inside to outside with compressed air

Error with fault code

Display in operating unit

AD83.65-D-4000A