Daikin VAM 1000EJ, Service Manual

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Troubleshooting Si-93
36 Troubleshooting
1.6 Damper System Error (Alarm)
Remote Controller
LCD Display
Error Code
666
6AAA A
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 PCB 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) (X5A or
X6A) on PCB 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 PCB assembly.
Is
relay
connector of
damper motor unit
connected?
NO
(HF005)
NO
Are connectors
connected?
NO
Check resistance and voltage
(HL029)