Si20-701_B Troubleshooting by Remote Controller
164
3.29
E4
Actuation of Pressure
Sensor
Remote Controller Display
E4
Applicable Models
RZQ-K, RZQ(S)-C, RZQG-L, RZR-KU/HU
Method of Error Detection
For except RZQG
[In cooling]
îš„ Detect error by the pressure sensor.
[In heating]
îš„ Detect error by the intermediate heat exchanger
thermistor.
For RZQG
[In cooling]
îš„ Detect error by the indoor unit intermediate thermistor.
[In heating]
îš„ Detect error by the intermediate heat exchanger
thermistor.
Error Decision Conditions
[In cooling]
îš„ When the detection pressure is the following value
0.12MPa or less continues for 5 minutes
For except RZQG
îš„ When the saturated pressure equivalent to the
detection temperature is the following value 0.12MPa
or less continues for 5 minutes
For RZQG
îš„ When the saturated pressure equivalent temperature
is -34°C
Supposed Causes
îš„ The stop valve is not opened
îš„ Defective pressure sensor and intermittent harness
îš„ Defective thermistor
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