Rheem 325 II Series Service Instructions Manual page 33

Fault Finding: Chart 1
1
No Hot Water
(No Power)
Is 240 volts present at the
thermostat?
TEST 2
NO
Is the heater connected to an off
peak tariff?
NO
Is the isolating switch or time
clock turned off?
NO
Is the fuse blown at the
switchboard?
YES
Reset circuit breaker
or rewire fuse.
Fault Finding: Charts 2 and 3
2
No Hot Water
(Fault 9 or Element Mode)
Is the Fault Code being displayed
Fault 9?
(9 red flashes)
NO
3
TM077: 325 & 410 Series II Heat Pump Service Instructions
Rev 00: Issued April 2014
This document is stored and maintained electronically by
Are the thermostat ECO contacts
YES
Contacts close when the Are the thermostat contacts
water temperature is
approximately 62°C.
Is 240 volts present at the
Did the fuse or circuit breaker
Does the element have the
closed? NO
TEST 3
YES
closed? NO
TEST 4
YES
controller? NO
TEST 5
YES
YES
YES
NO
blow again?
NO
NOTE
If a Fault Code was being displayed, re-start fault
diagnosis after the element problem is resolved.
YES
correct resistance? NO
TEST 6
YES
Service. All printed copies are deemed uncontrolled.
Install the element correctly and
reset the ECO.
NO
Is the element installed in the
correct orientation?
YES
Replace the thermostat.
Wiring incorrect.
Check the controller mains plug and
mains wiring loom from the
thermostat.
Replace the controller.
The heat pump is not suitable for an
off peak connection.
Connect to continuous tariff or Off
Peak 2, if available.
Restore power and advise customer.
Fault in household electrical wiring.
10
YES
1. Heat pump connected to mixed
circuit, possible excessive current
draw or another appliance with a fault.
2. Faulty circuit breaker or fatigued
fuse wire.
3. Unit may be short cycling due to
faulty thermostat.
11
Replace the element.
1. Possible wiring failure – locate and
repair the failure.
2. Main relay failure in controller –
replace the controller.
33