Four Way Valve Abnormality (Intermediate Stop) - Daikin VRV EMERION REYQ-AATJA Service Manual

Troubleshooting by Error Code

3.42 Four Way Valve Abnormality (Intermediate Stop)

Applicable
All outdoor unit models
Models
EA
Error Code
Sub code: 02-09
Method of Error
Detect the intermediate stop of the four way valve according to pressure sensors.
Detection
Error Decision
When there is no pressure difference between high and low pressure.
Conditions
Supposed
 Defective high pressure sensor
Causes
 Defective low pressure sensor
 Defective coil or harness of four way valve
 Defective four way valve
Troubleshooting
Connect the service checker.
Mount pressure gauges on the high
pressure and low pressure service ports.
379
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Is the
four way valve
NO
connector properly
connected to the
main PCB?
YES
Is the coil of the NO
four way valve fixed
correctly?
YES
Is the harness YES
of the four way valve
broken?
NO
NO
Are the high and
low pressure sensors
normal?
YES
SiUS372201EB
Connect the connector correctly.
Firmly fix the coil.
Replace the relevant coil and
harness.
Replace the relevant pressure
sensor.
Replace the relevant four way
valve.
Part 6 Service Diagnosis