Four Way Valve Abnormality (Not Switching) - Daikin VRV EMERION REYQ-AATJA Service Manual

SiUS372201EB

3.43 Four Way Valve Abnormality (Not Switching)

Applicable
All outdoor unit models
Models
EA
Error Code
Sub code: 14-21
Method of Error
Detect the non-switching of the four way valve according to temperature and pressure.
Detection
Error Decision
 When the evaporator is in a condenser-like refrigerant state
Conditions
 When the condenser is in an evaporator-like refrigerant state.
Supposed
 Defective high pressure sensor
Causes
 Defective low pressure sensor
 Defective outdoor air thermistor
 Defective heat exchanger gas pipe thermistor
 Defective heat exchanger liquid pipe thermistor
 Defective suction pipe thermistor
 Defective compressor suction thermistor
 Defective indoor unit thermistor
 Defective coil or harness of four way valve
 Defective four way valve
Part 6 Service Diagnosis
Troubleshooting by Error Code
380