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Rinnai 24 EHPA Heat Pump OIM
CONTROLLER LED FLASHING CODES
Ensure the controller unit is displaying the green LED once unit has been switched on. The continuous green LED
means that there is no fault.
Green LED Flashing Frequency / Second Explanation
Once Refrigeration On (Compressor, Fan, Pump)
Twice Heating Element On
Three Times Defrosting On (Solenoids)
If the controller is displaying the red LED, refer to the table below to nd the fault:
Red LED Flashing Frequency / Second Explanation
Once Tank Sensor- FAILURE
Twice Ambient Sensor - FAILURE
Three Times Evaporator Sensor - FAILURE
Four Times Compressor Discharge Sensor- FAILURE
Five Times Compressor Discharge Sensor ≥ 110° C
Six Times Low Pressure Switch Open
Seven Times High Pressure Switch Open
Eight Times Under Voltage <190 V AC
Nine Times Over Voltage > 265 V AC
The dip switches can be used to go to the test mode for the functionality of various components. In test mode the
output relays L1. L2, L3, L4 will be controlled manually by dip switches irrespective of input reading.
DIP Switch Conguration Explanation
No 8 Off – Factory Set Normal Operation Mode
No 7 Off – Default Normal Operation Mode
No 7 On Test Mode
No 7 + No 1 On Compressor (L1) On
No 7 + No 2 On Fan/Pump (L2) On
No 7 + No 3 On Element (L3) On
No 7 + No 4 On Defrost Solenoids (L4) ON
Any changes to the normal operating settings may adversely affect the performance of the heat pump
INSTALLATION
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