Rheem - RPNL/RPQL Lockout / Fault Codes

Article ID: 157

Last updated: 16 Mar, 2021

Rheem Heat Pumps: RPNL/RPQL

Re: Lockout Codes

"L" Terminal Output
Flashes	Description
1	Compressor running extremely long cycles
2	Low or High Pressure control trip
3	Unit short cycling
5	Compressor will not run
8	Control mis-operation
9	Low control voltage

7-Segment Display Codes
0	Standby	No call for operation
c	Call on Y1	1st Stage Unit Operation
C	Call on Y2	2nd Stage Unit Operation
d	Defrost	Unit is in Defrost Mode
d (flash)	Abnormal Defrost
F	ICC Fuse Open	Low voltage short
21	Low pressure trip (auto reset)
L21	Low Pressure Lockout (hard lockout)
23	High Pressure Trip (auto reset)
L23	High Pressure Lockout (hard lockout)
25	Bad OD Temperature Sensor	Control will continue to operate
27	Abnormally Low Line Voltage
28	Abnormally High Line Voltage
L5	Compressor Lockout (hard lockout)

Hard Lockout Reset Methods:

FAULT RECALL

To enter FAULT RECALL mode press both TEST and SW2 buttons at the same time with insulated probes for 1 second and release.

Upon entering and exiting the FAULT RECALL mode, the top and bottom segments of the 7-segment display will be activated.
The ICC will automatically scroll through stored faults on the 7-segment display.
Each fault is displayed one time with the top segment of the 7-segment display activated between faults .
Each fault is displayed with the most recent fault displayed first.
An “O” will be displayed when no faults are stored.
The ICC will automatically exit the FAULT RECALL mode after displaying stored faults.

CLEAR FAULT HISTORY

To clear FAULT HISTORY press both TEST and SW2 buttons at the same time with insulated probes for 5 seconds and release.