Rheem Heat Pump: RPNE Re: Diagnostic Codes / Fault Codes The defrost board uses two LEDs for diagnostics. The LEDs flash a specific sequence according to the condition. DIAGNOSTIC CODES: LED 1 LED 2 Description Alt Flashing Anti-Short-Cycle Delay Off Off No 24V...

Rheem/Ruud Heat Pump: RPNE/UPNE Re: Low Pressure Lockout - COOLING Units with model numbers ending in "JAZ" have an advanced defrost control with separate Low and High Pressure inputs and two diagnostic LED's. A Low Pressure Lockout is indicated by the following LED pattern on the defrost...

Rheem/Ruud Heat Pump: RPNE/UPNE Re: Low Pressure Lockout - HEATING Units with model numbers ending in "JAZ" have an advanced defrost control with separate Low and High Pressure inputs and two diagnostic LED's. A Low Pressure Lockout is indicated by the following LED pattern on the defrost...