Damper System Error (Alarm) - Daikin VAM 500EJ Service Manual

Troubleshooting
1.6

Damper System Error (Alarm)

Remote Controller
Error Code
LCD Display
LED Indication
Remote Controller
Error Detection
Measurement of damper motor limit ON/OFF time.
Method
I When damper motor limit switch 1 (or 2) remains ON (or OFF) for more than a certain time duration
Error Generating
Conditions
I When damper motor limit switch 1 (or 2) repeats ON/OFF operations after damper motor 1 (or 2) stops.
I Faulty damper motor or limit switch
Possible Causes
I Broken wire in cable
I Faulty contact in connector (including relay connector)
I Faulty control PCB assembly
Troubleshooting
Note: Note 1:
I Place tester probes on connectors of limit switch. Move switch by hand and check continuity. If tester
I Place tester probes on connectors of damper motor and check resistance. If tester indicates approx. 17
36
6 6 6 6 A A A A
—
Inspection
4
Main Unit
after ventilation mode is changed.
Is
relay
connector of
damper motor unit
connected?
YES
Check connectors
(X3A or X4A) (X5A or
X6A) on PCB assembly
of damper motor unit.
Are connectors
connected?
YES
Is
damper
motor unit
operating
normally?
Note 1
YES
indicates 0Ω when limit switch turns on, and infinity when it turns off, limit switch is normal.
kΩ in 200-V model, damper motor is normal.
5
Unit No.
5
NO
NO
NO
Check resistance and voltage
(HL029)
Connect relay connector.
Connect connectors.
Replace damper motor unit.
Replace control PCB assembly.
(HF005)
Troubleshooting
Si-93