Daikin VRV RXYMQ-A Series Service Manual page 250

Troubleshooting by Error Code
Note(s)
1. RXYMQ4AVMK: outdoor unit main PCB (A1P)
2. RXYMQ4AVMK: outdoor unit main PCB (A1P)
Reference
CHECK 2 Refer to page 272.
244
A
Are the
characteristics of
the inverter fin temperature
thermistor normal?
(Refer to L4
troubleshooting.)
YES
CHECK 12
Are the characteristics
of the low pressure
sensor normal?
YES
CHECK 12
Are the characteristics
of the high pressure
sensor normal?
YES
CHECK 18
Are the characteristics and
insulation of the electronic expansion
valve (refrigerant jacket)
(Y3E) normal?
YES
CHECK 2
Is refrigerant shortage detected
as a cause of abnormally
low pressure?
YES
CHECK 3
Is refrigerant shortage detected
as a cause of superheating
operation?
YES
CHECK 7
Is refrigerant
insufficient?
NO
RXYMQ4-6AYFK: inverter PCB (A3P)
RXYMQ4-6AYFK: outdoor unit main PCB (A1P) and inverter PCB (A3P)
NO
NO
NO
NO
CHECK 2
NO
Is another cause detected as a
cause of abnormally low
pressure?
NO
CHECK 3
NO
Is another cause detected
as a cause of superheating
operation?
NO
YES
SiME332106E
Replace the relevant PCB
( 1 ).
Replace the low pressure
sensor (S1NPL).
Replace the high pressure
sensor (S1NPH).
Replace the electronic
expansion valve coil (Y3E).
YES
Correct the abnormally low
pressure.
YES
Correct the superheating
operation.
Correct the insufficient low
refrigerant condition.
Replace the relevant
PCB(s) ( 2 ).
If the error recurs, replace
the electronic expansion
valve (refrigerant jacket)
(Y3E).
Part 6 Service Diagnosis