Rinnai 23
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 find 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 Configuration
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
