Daikin GQI-Eco Series, Руководство по обслуживанию, Страница: 156 / 215

Troubleshooting by Remote Controller ESIE15-13B
142 Service Diagnosis
4.15 Actuation of Pressure Sensor
Remote
Controller
Display
E4
Applicable
Models
RZQG
Method of Error
Detection
 Detect the continuity of low pressure switch (S2PL) with the protection device circuit.
[In cooling]

Detect error by the indoor unit intermediate thermistor (R3T).
[In heating]
 Detect error by the intermediate heat exchanger thermistor (R5T).
Error Decision
Conditions
 When the low pressure switch is activated.

When the detection pressure is the following value
0.12MPa or less continues for 5 minutes
(When the saturated pressure equivalent temperature is –34°C). This is explain for
“0.12MPa”.
Supposed
Causes
 The stop valve is not opened

Disconnection of outdoor unit intermediate thermistor

Disconnection of indoor unit intermediate thermistor
 Defective thermistor
 Defective outdoor unit PCB (A1P)

Abnormal drop of low pressure

Refrigerant shortage