Daikin VRV RXYMQ-A Series, Руководство по обслуживанию

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SiME332106E Troubleshooting by Error Code
Part 6 Service Diagnosis 253
Note(s)
Troubleshooting

2. RXYMQ4AVMK: 220-240V between L and N
RXYMQ4-6AYFK: 380-415V between L1 and N
Do all
indoor unit
remote controllers in
the same refrigerant
system display
U4 ?
Are the
indoor-outdoor
transmission wirings
normal?
Fuse on the
outdoor unit main PCB
has blown out.
Does the
seven-segment display
show (1) or (2)?
( 1)
The lamp
does not turn OFF
for a period of 12 minutes
or more.
Are the
indoor-outdoor
transmission wirings
normal?
Is voltage
between terminals ( 2)
of the outdoor unit main
PCB normal?
Does the
microcomputer
normal monitor (HAP) on
the outdoor unit
main PCB blink?
Has the
indoor or
outdoor unit PCB
been replaced, or has
the indoor-outdoor
transmission
wiring been
modified?
U4-01
1 :OFF :ON :BLINK
SEG1 SEG2 SEG3
(1)
(2)
Correct the voltage.
Replace the fuse.
Modify the transmission
wirings.
Press and hold RETURN
(BS3) on the outdoor unit
main PCB (A1P) for a period
of 5 seconds or more.
Replace the outdoor unit main
PCB (A1P).
YES
NO
YES
YES
Replace the indoor unit PCB.
Press and hold RETURN
(BS3) on the master outdoor
unit main PCB (A1P) for a
period of 5 seconds or more.
(The system will not operate
for a period of 12 minutes at
maximum.)
Modify the transmission
wirings.
YES
Go to the next page.
U4-03
(Indoor unit system
transmission error)
NO
NO
NO
Replace the outdoor unit
main PCB (A1P).
NO
YES
NO
NO
NO
NO
YES
NO
Reset the power supply once.
YES
YES
Check for details of error in
monitor mode.
YES
YES
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.