Specifications

Si30-813 Troubleshooting by Indication on the Remote Controller
Troubleshooting 197
2.19
“
E4
”
Outside Unit: Actuation of Low Pressure Sensor
Remote
Controller
Display
E4
Applicable
Models
Outside unit
RWEYQ8P, 10P
Method of
Malfunction
Detection
Judge the pressure detected by a low pressure sensor with the main PC board.
Malfunction
Decision
Conditions
When low pressure drops while the compressor is in operation
Working pressure: 0.07 MPa
(Retry: 3 times)
Supposed
Causes

Abnormal low pressure drop

Faulty low pressure sensor

Faulty main PC board

The stop valve left closed

Insufficient heat source water

Dirty water heat exchanger