VAT PLUTO Series User Manual

Volta Air Technology Owner’s Manual
Van Refrigeration & Freezer Unit
47
CONFIDENTIAL
Pluto Refrigeration Troubleshooting
Controller Fault Code Indication
Fault Code
Description
Action Items
OPE 1
Air temperature sensor is open circuit
1
SHr 1
Air temperature sensor is short circuit
1
OPE 2
Defrost (evaporator) temperature sensor is open circuit
2
SHr 2
Defrost (evaporator) temperature sensor is short circuit
2
OPE 3
Ambient temperature sensor is open circuit
3
SHr 3
Ambient temperature sensor is short circuit
3
HPEr
High pressure fault: discharge pressure is higher than 240 psi
4,5,6,26,7,8
LPEr
Low pressure fault: suction pressure is lower than 5 psi
9,10,41,7,40,11
LVEr
Under voltage fault: input voltage is lower than 10 V
12,14,15,16,17,13,42
HVEr
Over voltage fault: input voltage is higher than 16 V
13,14
Symptom Indication – No Fault Codes
Symptom
Possible Problem
Action Items
The reefer unit does not start
No power to controller
17,16,15,12
Unit is on, air flow is insufficient
Evaporator airflow blocked
9,10
Evaporator is iced up
Defrost needed, plugged drain, insufficient airflow
31,38,39,9,10
Unit is on, evaporator fan(s) is off
No power/wake up signal to evaporator fan(s)
21,18,19,20,17,22
Condenser fan not working
Bad connections, defective relay / fuse / fan switch / fan motor
33,45,35,34,17,22
High discharge pressure
Refrigerant overcharge, condenser malfunction
4,5,26,7,8
Low discharge pressure
Defective compressor, low refrigerant charge, hot gas valve is open
25,28,27,7,24
High suction pressure
Defective compressor / expansion valve, hot gas valve is open
32,11,24,28,27
Low suction pressure
Low evaporator air flow, low refrigerant charge, defective TXV
9,10,25,7,11
Water leaks / splashes from
evaporator
Plugged drain / slanted evaporator pan
38,39

VAT PLUTO Series Specifications

General

Brand	VAT
Model	PLUTO Series
Category	Refrigerator
Language	English