Part 5. Trouble Shooting
- 55 -
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Only for training and service purposes
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10
Indoor BLDC Fan Motor
Lock
The Fan is not operated
properly
Check the Indoor fan locking
Display
code
Title
Cause of error
Check point & Normal condition
Check Point
Check the PCB during the Power on
1. Check the Voltage Red line to Black line
→
The Voltage is about [input voltage x 1.414]
→
if the Voltage does not come with the above Voltage,
→
Check the power input
→
Replace the PCB & Motor
2. Check the Voltage Black line to White
→
the Voltage is DC 15V
→
Check the Power input
→
Replace the motor
Check the Motor
1. Check the shaft
→
if the shaft is not turn smoothly, the Motor Power IC is defected
→
replace the motor
2. Check the motor resistance(if the shaft is turn smoothly, check the resistance)
→
Check Red line to Black line, Blue line to Black line
→
The resistance should infinite
→
replace the motor
Tester
Fan motor
connector
Yellow
Blue
White
Black Red
Summary of Contents for A2UW18GFA0
Page 113: ...P NO MFL68280201 January 2014 ...
