Rheem 325 II Series Service Instructions Manual page 42

Fault Finding: Chart 11.1
11.1
Red LED: 1 flash
Fault 1
Compressor Over-Temperature (> 110°C)
Is the compressor sensor
working?
TEST 1
YES
Is the tank sensor working?
TEST 1
YES
Is the tank sensor firmly attached
to the tank?
YES
Reset the heat pump using the
reset button, and use the proxy
sensor or draw off water to initiate
a call for heating.
Does the evaporator fan come on
at the same time as the
compressor, and run in the
correct direction at full speed?
YES
Is there a water flow problem?
NO
TM077: 325 & 410 Series II Heat Pump Service Instructions
Rev 00: Issued April 2014
This document is stored and maintained electronically by
NO
NO
NO
The evaporator
fan exhausts air
out the front of
the heat pump.
Is 240 volts present at the
NO fan plug?
TEST 10
YES
Are the fan motor winding
resistances correct?
TEST 11
YES
Is the fan capacitor working?
TEST 12
YES
Is the fan wiring faulty or
incorrect?
NO
YES
12
NO
NO
NO
YES
Service. All printed copies are deemed uncontrolled.
Replace the sensor.
Replace the sensor.
Stud Mount: Tighten the nut retaining
the sensor to the stud on the tank and
ensure the heat transfer pad is in
place.
External Jacket Mount: Ensure the
sensor has clean contact with the
cylinder, the spring is OK and the
mounting screw is tight.
Connect the fan wiring or plug firmly
and correctly to the controller.
NO
Is the fan plug firmly and correctly
connected to the controller?
YES
Ensure that the plug pins are clean
and making firm electrical contact. If
the pins are OK, replace the controller.
Replace the fan.
Replace the controller.
Repair or replace the faulty fan wiring.
Replace the controller.
11.10
9
42