
TM017 Rheem Air Sourced Heat Pump Service Instructions REV: C
Date of Issue: 5/11/05
This document is stored and maintained electronically by
Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”.
31
551275 Power Supply Fault Finding - Chart 7
7
Warning: Terminals may be ‘live’.
Personal Protective Equipment
should be worn
Is 240
volts present at
the terminal
block?
Test 1
1.1
YES
Is
the heater
connected to an
off peak
tariff?
NO
Off peak connection is unsuitable for Heat
Pump models. Connect to continuous tariff or
‘off peak 2’ if available
YES
Is
the isolating switch
turned off?
NO
Restore power and advise customer
YES
Is the
fuse blown at the
switchboard?
NO
Fault in household electrical wiring
NO
Reset circuit breaker
or rewire fuse
YES
Did
the fuse or
circuit breaker blow
again?
6
YES
1. Faulty circuit breaker or fatigued fuse wire
2. Unit may be short cycling due to faulty
thermostat
NO
Is the
evaporator
thermostat in boost
mode?
Test 13
NO
8
YES
Is
the evaporator
thermostat in heat pump
mode?
Test 14
YES
NO
Booster circuit may
have electrical fault