Daikin VRV RXYMQ-A Series Service Manual page 248

Troubleshooting by Error Code
Troubleshooting
Reference
CHECK 2 Refer to page 272.
Reference
CHECK 3 Refer to page 273.
Reference
CHECK 7 Refer to page 279.
242
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Are the
characteristics of the NO
suction pipe thermistor
normal?
YES
Are the
NO
characteristics of the
low pressure sensor
normal?
YES
CHECK 2
NO
Is refrigerant shortage detected
as a cause of abnormally
low pressure?
YES
CHECK 3
NO
Is refrigerant shortage detected
as a cause of superheat
operation?
YES
CHECK 7
YES
Is refrigerant
insufficient?
NO
CHECK 2
YES
Is another cause detected as a
cause of abnormally low
pressure?
NO
CHECK 3
YES
Is another cause detected
as a cause of superheat
operation?
NO
SiME332106E
Replace the thermistor
(R3T).
Replace the low pressure
sensor (S1NPL).
Correct the abnormally low
pressure.
Correct the superheat
operation.
Correct the insufficient low
refrigerant condition.
Replace the outdoor unit
main PCB (A1P).
Part 6 Service Diagnosis