3-76
SM-16007
TROUBLESHOOTING
Alarm
&RGH
$EQRUPDOLW\RI7KHUPLVWRUIRU2XWGHDW([FKDQJHU*DV3LSH
(Tg/Tbg)
Yes
Yes
Connect them.
No
Failure of Thermistor
Failure of O.U. PCB
No
Are thermistors connected to
THM11 (Tg) or THM23 (Tbg)
on O.U. PCB?
Is resistance of thermistors
THM11 and THM23 between
0.2k
Ω
and 840k
Ω
?
Refer to "Alarm Code 24"
for thermistor resistance.
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+
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Cause
Check Item
Action
(Turn OFF Main Switch)
Event
Check resistance.
Replace thermistor
if faulty.
Failure
Check wiring to
O.U. PCB.
Repair wiring and
connection.
Incorrect Connection
Replace O.U. PCB
and check operation.
Replace O.U. PCB
if faulty.
Failure of O.U. PCB
Failure of
Outdoor Unit
Gas Pipe
Thermistor
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Summary of Contents for YVAHP0721CW Series
Page 2: ......
Page 10: ...viii SM 16007 ...
Page 14: ......
Page 15: ...SM 16007 1 1 INSTALLATION 1 Installation ...
Page 163: ...SM 16007 2 1 OPERATION 2 Operation ...
Page 164: ...2 2 SM 16007 OPERATION Ɣ 5HIHU WR WKH 6HUYLFH 0DQXDO IRU QGRRU 8QLW RU RQWUROOHU ...
Page 165: ...SM 16007 3 1 TROUBLESHOOTING 3 Troubleshooting ...
Page 284: ......
Page 285: ...SM 16007 4 1 MAINTENANCE 4 Maintenance ...
Page 360: ......
Page 390: ......
Page 391: ...SM 16007 6 1 FIELD WORK INSTRUCTIONS 6 Field Work Instructions ...
Page 400: ...6 10 SM 16007 FIELD WORK INSTRUCTIONS 0ROOLHU KDUW IRU 5 ft 3 l b ...
Page 401: ...SERVICE PARTS LIST SM 16007 7 1 7 Service Parts List ...
Page 416: ... 2016 Johnson Controls Inc SM 16007 Code No LIT 12012400 Issued November 2016 ...