Rheem 325 II Series Service Instructions Manual page 16

The evaporator sensor temperature is less than –3°C or greater than 40°C when
the system is in Heat Pump Mode, any time after the first 10 minutes of compressor
operation
The Freeze Protection function may be required whilst in Element Mode – Ambient, refer
to the Freeze Protection section on page 17.
Element Mode – Fault
During Element Mode – Fault, the red LED will display a fault code indicating the fault that
has occurred – see the LED Status Code Tables on page 19.
The Freeze Protection function may be required whilst in Element Mode – Fault, refer to
the Freeze Protection section on page 17.
The faults listed in the table below will cause the water heater to enter Element Mode –
Fault.
Fault
Compressor Over-Temperature Fault
Fault 1
Compressor Cooling Fault
Fault 3
Tank Sensor Fault
Fault 4
Evaporator Sensor Fault
Fault 5
Compressor Sensor Fault
Fault 6
Heat Exchanger Water Outlet Sensor Fault
Fault 7
Water Flow Fault
Fault 8
FAULT 9 – HEATING DISABLED
When Fault 9 is current and heating is disabled, the red LED will display 9 flashes.
Fault 9 is a Refrigeration System Fault and is detected when the compressor sensor
temperature is less than 12°C higher than the evaporator sensor temperature at any time
after the first 10 minutes of compressor operation.
First and Second Consecutive Occurrences of Fault 9
On the first and second consecutive occurrences of Fault 9, the heat pump will return to
System Check. Although the system attempts to re-start the first two consecutive times,
each occurrence of Fault 9 is still stored in the controller‟s memory as per the Last Fault
Code function – see page 18. After the first and second consecutive occurrences of Fault
9, the Fault 9 counter will be reset if a successful completion of a heat pump heating cycle
occurs.
TM077: 325 & 410 Series II Heat Pump Service Instructions
Rev 00: Issued April 2014
This document is stored and maintained electronically by
Description Condition
The temperature detected by the compressor
sensor is greater than 110ºC.
During System Check, the compressor
sensor detects a temperature greater than
60ºC that persists for more than 90 minutes.
The tank sensor has failed.
The evaporator sensor has failed.
The compressor sensor has failed.
The heat exchanger water outlet sensor has
failed.
The temperature detected by the heat
exchanger water outlet sensor is greater than
73ºC.
Service. All printed copies are deemed uncontrolled.
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