VAT PLUTO Series User Manual

Volta Air Technology Owner’s Manual
Van Refrigeration & Freezer Unit
48
CONFIDENTIAL
Defrost not working
Defrost setting parameters are wrong
31
Bad connections, defective relay / fuse / solenoid
36,37,28,26,27,17,22
Reefer is on, blowing warm air
Compressor does not start / defective compressor
15,23,43,24,17,22
Compressor is working, not enough refrigerant
25,7
Compressor is working, not enough refrigerant flow
11,24
Compressor is working, hot gas valve is open, condenser pressure
control valve (CPCV) is not closed
22,28,26,27
Reefer is on, cooling is
insufficient
Ambient temperature exceeds maximum operating temperature
(43°C/110F)
29
Poor thermal insulation / too many door openings / big thermal inertia
30,44
Compressor is going on and off
4,5,15,43,23,22,26,24
Not enough refrigerant
25,7
Frosted, plugged evaporator / defective evaporator fan
9,10,31,38,39
Defective expansion valve
32,11
Action Item
Description
1
Check air temperature sensor resistance, plug, and continuity to controller
2
Check evaporator temperature sensor resistance, plug, and continuity to controller
3
Check ambient temperature sensor resistance, plug, and continuity to controller
4
Check that the condenser fan(s) is on and the air flow is sufficient
5
Check that the condenser coil is not plugged by dirt / debris
6
Check high pressure switch and continuity to controller
7
Check refrigerant charge
8
Check that the receiver-drier is not plugged
9
Check that the evaporator fan(s) is on and the air flow is sufficient
10
Check that the evaporator core is not plugged by dirt, frost, or block of ice
11
Check the TXV (thermostatic expansion valve) inside the evaporator box
12
Check charging system including charging cable connections and main fuse at the truck battery

VAT PLUTO Series Specifications

General

Brand	VAT
Model	PLUTO Series
Category	Refrigerator
Language	English