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10
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No.
Error
Cause
Action
1 The product
does not oper-
ate.
Is the circuit breaker turned on?
Turn on the breaker.
Is the external ON/OFF switch turned
on?
Turn on the external ON/OFF switch.
Is the wiring correct?
Check the wiring.
Is there any connection failure of the
wiring?
Check that the wiring connections are securely
performed.
Is the rated power supplied to the
product?
Check that the rated power is supplied to the
product.
Are the motors conducted?
Replace the faulty motors.
2 The product
does not oper-
ate properly.
Do any objects get caught in the gaps
between the propeller fan and orifice?
Remove the objects.
Do any of the propeller fans contact
with the orifice?
Check the propeller fans and orifices, and re-
place any deformed components with new ones.
The fan does
not rotate.
Are the propeller fans deformed?
Replace the deformed propeller fans.
The fan
speed cannot
be changed.
Is the external HIGH/LOW switch cor-
rectly operated?
Operate the HIGH/LOW switch correctly in ac-
cordance with the Operating and Installation
instructions.
3 The product
generates ab-
normal sounds
or vibrations.
Do any objects get caught in the gaps
between the propeller fan and orifice?
Remove the objects.
Do any of the propeller fans contact
with the orifice?
Check the propeller fans and orifices, and re-
place any deformed components with new ones.
Are the propeller fans deformed?
Replace the deformed propeller fans.
Is the product securely mounted?
Check the installation conditions of the product.
8. Before receiving repair requests
Frequently asked question
Response
The product does not operate even though
the external ON/OFF switch is turned on.
[1] If the circuit breaker is off, turn it on.
[2] Check if power failure has occurred.
The product generates abnormal sounds
or vibrations.
[1] If any objects are caught on the propeller fans, remove them.
[2] If the guard is almost detached (or tilted), fix it firmly.
[3] If any of the mounting screws are loose, tighten them properly.
9. Service inspection list
Location
Inspection Item
Check Result
Electric
wiring
Is the power source securely connected?
Is the wiring correct?
Appliance
Is the main unit securely mounted?
Is grounding established properly?
Does the product operate as described in the Operating and Installation instructions
when the external ON/OFF switch is operated?
Are the propeller fans rotating?
Does the product operate without abnormal vibrations or sounds?
7-2 Checklist