Actuation Of Pressure Sensor - Daikin RZQG71L9V1 Service Manual

Troubleshooting by Remote Controller

4.15 Actuation of Pressure Sensor

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