Cooler Operation
(cont.)
Pump Operation
(cont.)
Electrical Checks
If power present:
•
Check the pump wire loom and connections.
•
Refer to mechanical pump checks on page 45.
•
Check the pump motor winding is not open circuit.
•
Isolate the electrical supply and use a multimeter on the Ohm's setting to check
the circuit resistance at terminals PUMP-NEUTRAL and PUMP-ACTIVE (169
Ohms +/- 5% @ 20
0
C.)
•
Replace pump winding assembly.
OFF
10 A
V
COM
FUSED
1000V- - -
750V
V
Ohms
Multimeter
169
A
PUMP - NEUTRAL
PUMP - ACTIVE
If pump doesn't operate:
•
Refer to mechanical checks.
•
Replace pump.
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