Specifications

SiUS39-601 Troubleshooting by Indication on the Remote Controller
Troubleshooting 139
2.16
“E5”
Compressor Motor Lock
Remote
Controller
Display
E5
Applicable
Models
RXYQ72M, 96M
Method of
Malfunction
Detection
Inverter PC board takes the position signal from UVWN line connected between the inverter and
compressor, and detects the position signal pattern.
Malfunction
Decision
Conditions
The position signal with 3 times cycle as imposed frequency is detected when compressor motor
operates normally, but 2 times cycle when compressor motor locks. When the position signal in 2
times cycle is detected.
Supposed
Causes

Compressor lock

High differential pressure (72psi or more)

Incorrect UVWN wiring

Faulty inverter PC board

Stop valve is left in closed.