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Service Manual
3-79
TROUBLESHOOTING
VDC-
LED5
PC4
CN1
VCC15
GND VCC05
VCC13
PC4-No.2
2 FG (Blue)
3 Vsp (Yellow)
4 Vcc (White)
5 GND (Black)
8 Vdc (Red)
< Checking for Fan Motor >
Remove the connector of the fan motor and measure the resistance value between each of the pins (twice).
Check whether the resistance value is over or not according to the table shown below. When performing
the second measuring, make sure to change the tester (Red/ Black).
1st
2nd
Decision Basis
Tester
Resistance
Value
Tester
Resistance
Value
Resistance values
of both 1st and 2nd
measurings are over 10
Red
Black
:
Red
Black
:
FG
GND
GND
FG
Vsp
GND
GND
Vsp
Vcc
GND
GND
Vcc
Vdc
GND
GND
Vdc
PC4-No.2
VCC13
LED5
VDC-
VCC05 GND
PC4 VCC15 CN1
2 FG (Blue)
3 Vsp (Yellow)
4 Vcc (White)
5 GND (Black)
8 Vdc (Red)
Connector for Fan Motor
< Checking for Fan Motor >
Remove the connector of the fan motor and measure the resistance value between each of the pins (twice).
Check whether the resistance value is over or not according to the table shown below. When performing
the second measuring, make sure to change the tester (Red/ Black).
Ɣ:D\&DVVHWWH7\SH
Ɣ:D\&DVVHWWH7\SH
1st
2nd
Decision Basis
Tester
Resistance
Value
Tester
Resistance
Value
Resistance values
of both 1st and 2nd
measurings are over 10
Red
Black
:
Red
Black
:
FG
GND
GND
FG
Vsp
GND
GND
Vsp
Vcc
GND
GND
Vcc
Vdc
GND
GND
Vdc
Summary of Contents for YVAHP072B31S
Page 2: ......
Page 10: ...viii Service Manual ...
Page 16: ......
Page 17: ...Service Manual 1 1 INSTALLATION 1 Installation ...
Page 577: ...Service Manual 1 561 INSTALLATION 9 Touch Back to return to the Service Menu screen 9 ...
Page 920: ......
Page 921: ...Service Manual 2 1 OPERATION 2 Operation ...
Page 1315: ...Service Manual 3 1 TROUBLESHOOTING 3 Troubleshooting ...
Page 1461: ...Service Manual 4 1 MAINTENANCE 4 Maintenance ...
Page 1728: ......
Page 1729: ...Service Manual 6 1 FIELD WORK INSTRUCTIONS 6 Field Work Instructions ...
Page 1738: ...6 10 Service Manual FIELD WORK INSTRUCTIONS 6 8 Mollier Chart for R410A ft 3 l b ...
Page 1739: ...SERVICE PARTS LIST Service Manual 7 1 7 Service Parts List ...
Page 1795: ......
Page 1796: ... 2015 Johnson Controls Inc SM 15001 ...