Actuation Of Pressure Sensor - Daikin ZQG71~140L7V1B Service Manual

ESIE12-06

4.14 Actuation of Pressure Sensor

E4
Remote
Controller
Display
Applicable
RZQG
Models
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).
Error Decision [In cooling]
Conditions  When the detection pressure is the following value
 When the saturated pressure equivalent temperature is –34°C
Supposed  The stop valve is not opened
Causes  Disconnection of outdoor unit intermediate thermistor
 Disconnection of indoor unit intermediate thermistor
 Defective thermistor
 Defective outdoor unit PCB (A1P)
 Abnormal drop of low pressure
Service Diagnosis
0.12MPa or less continues for 5 minutes
Troubleshooting by Remote Controller
151