Daikin VRV EMERION REYQ-AATJA Service Manual page 388

Troubleshooting by Error Code
Troubleshooting
Connect the service checker.
Mount pressure gauges on the high
pressure and low pressure service ports.
381
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
NO
Are all thermistors
mounted properly?
YES
Is there any
discrepancy between
YES
the temperature value at the
service checker and the actual
temperature of each
thermistor?
NO
SiUS372201EB
Connect the connector correctly.
Firmly fix the coil.
Replace the relevant coil and
harness.
Replace the relevant pressure
sensor.
Mount correctly.
Replace the relevant thermistor.
Replace the relevant four way
valve.
Part 6 Service Diagnosis