Daikin VKM50GAV1, Service Manual

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Troubleshooting Si71-812
60 Troubleshooting
2.5 Damper System Error (Alarm)
Remote
Controller LCD
Display Error Code
6A
Inspection — Unit No.
5
LED Indication Remote Controller 4 Main Unit 5
Error Detection
Method Measurement of damper motor limit ON/OFF time.
Error Generating
Conditions
„
When damper motor limit switch 1 (or 2) remains ON (or OFF) for more than a certain time
duration after ventilation mode is changed.
„
When damper motor limit switch 1 (or 2) repeats ON/OFF operations after damper motor 1
(or 2) stops.
Possible Causes
„
Faulty damper motor or limit switch
„
Broken wire in cable
„
Faulty contact in connector (including relay connector)
„
Faulty control PC board (A1P) assembly
Troubleshooting
Note: Note 1:
„
Place tester probes on connectors of limit switch. Move switch by hand and check continuity.
If tester indicates 0
Ω
when limit switch turns on, and infinity when it turns off, limit switch is
normal.
„
Place tester probes on connectors of damper motor and check resistance. If tester indicates
approx. 17 k
Ω
in 200-V model, damper motor is normal.
Check connectors
(X3A or X4A) on PC
board (A1P) assembly of
damper motor unit.
Is
damper
motor unit
operating
normally?
Note 1
YES
YES
YES
Connect relay connector.
Connect connectors.
Replace damper motor unit.
Replace control PC board
assembly.
Is
relay
connector of
damper motor unit
connected?
NO
(HF005)
NO
Are connectors
connected?
NO
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Check resistance and voltage
(HL029)