3-72
SM-16007
TROUBLESHOOTING
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Alarm
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Is connector CN7
of O.U. PCB abnormal?
Is 5 VDC applied between
#1 and #3 of connector
CN7 of O.U. PCB?
Yes
Yes
Is voltage under 0.1 VDC
or over 4.9VDC between
#2 and #3 of connector
CN7 of O.U. PCB?
Is access port clogged?
Failure of
high pressure sensor
Connect it correctly.
Failure of O.U. PCB
Yes
No
No
No
No
Failure of O.U. PCB
Replace access port.
Yes
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Cause
Check Item
Action
(Turn OFF Main Switch)
Event
Failure of
Thermistor
on Top of
Compressor
Check resistance.
Replace thermistor
if faulty.
Failure
Indicated Value of
Pressure Value
is Excessively
High or Low
Replace check joint.
Malfunction of Pressure
Sensor due to Faulty
Check Joint
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
Check for clogging
of check joint.
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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 ...