De-Ice Thermostat Fault Finding - Chart 2.3; Evaporator Thermostat Fault Finding - Chart 2.4 - Rheem 55027500 Service Instructions Manual

De-ice Thermostat Fault Finding - Chart 2.3

2.3
Test 11
Are
the de-ice
thermostat contacts
closed?
YES
Is the
evaporator fan
running?
2.1

Evaporator Thermostat Fault Finding - Chart 2.4

2.4
Test 13
Is
the heat
pump in boost
mode?
YES
NOTE: While in boost mode the evaporator will defrost naturally, depending on the
ice build up this may take several hours
TM017 Rheem Air Sourced Heat Pump Service Instructions REV: C
Date of Issue: 5/11/05
This document is stored and maintained electronically by
NO
Is the
bypass solenoid
open circuit?
NO
Is
YES the air flow
obstructed?
NO
Does the
boost circuit
have the correct
resistance?
Service. All printed copies not bearing this statement in RED are deemed "uncontrolled".
Test 12
YES
YES
NO
Test 18
YES
NO
24
Replace de-ice thermostat
Replace bypass valve solenoid
Remove obstruction or clear
evaporator
Long periods of cold weather
will result in poor recovery
performance
Replace evaporator thermostat
3
8