Rheem 310 Series Service Instructions Manual page 8

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H
Red LED Flashing
Relay de-energised
Element On
T2
> 2°C?
Ambient temperature high enough
NO
to resume heat pump operation
T4
> 2°C?
NO
S4
Sensor
ok?
YES
S1
Sensor
ok?
YES
Boost Mode
220L heated to
approx. 60°C
S1
YES
>62°C?
NO
TM025 Rheem Heat Pump Service Instructions REV: B
Date of Issue: 02/08/07
This document is stored and maintained electronically by
YES
YES
Controller can no longer detect
upper cylinder temperature.
The circulator will not operate
NO
preventing water below the
element level from heating
Temperature at sensor S4 will
not achieve 53°C
Limp Mode
111L heated to
approx. 70°C
Temp at
thermostat =
70°C?
YES
Element Off
S4
>53°C?
NO
Circulator On
NO
S1
<61°C?
YES
NO
A
NO
NO
Element On
NO
Power to controller off
YES
S4
Circulator Off
>53°C?
7
Service. All printed copies not bearing this statement in RED are deemed "uncontrolled".
Controller can no longer detect
lower cylinder temperature.
Water temperature will be
controlled by mechanical
thermostat to 70°C
S1
Sensor
ok?
Boost Mode
220L heated to
YES
approx. 70°C
S1
>62°C?
YES
Circulator On
S1
NO
<61°C?
YES
Circulator Off
Temp at
thermostat =
70°C?
YES
Element Off
YES
Element On
NO
NO
Y
Heating Cycle
complete
Z