A6" Ahu: Fan Motor (M1F) Lock, Overload - Daikin ERQ Service Manual

ESIE09-05
A6
3.3 " " AHU: Fan Motor (M1F) Lock, Overload
A6
Remote
Controller
Display
Applicable
All AHU models
Models
Method of Detection by failure of signal for detecting number of turns to come from the fan motor
Malfunction
Detection
Malfunction
When number of turns can't be detected even when output voltage to the fan is maximum
Decision
Conditions
Supposed
Causes
Troubleshooting
Troubleshooting
Fan motor lock
Disconnected or faulty wiring between fan motor and PC board
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Is the
wiring from the fan
NO
motor securely connected
to connectors on the
AHU PC
board?
YES
Wiring
between the
YES
AHU PC board and
fan motor is
disconnected.
NO
YES
Does the fan motor run?
NO
Troubleshooting by Indication on the Remote Controller
Connect the wiring and turn on
again.
Fix the wiring and turn on again.
Replace the AHU PC board.
Replace the fan motor.
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(V2779)
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