3-2
SM-18003
TROUBLESHOOTING
Check the following items if there is any abnormality in the activation of the system.
No.
Check Situation
Check Method
1 Is any power source breaker or
fuse open?
Check the voltage (secondary side) of the breaker and also
check the continuity of the fuse with a tester.
2 Is voltage at the secondary side
of the transformer correct?
Disconnect at the secondary side of the transformer and measure
voltage with a tester.
3
Is wiring firmly secured and
correctly connected?
Check that the following wiring connection on O.U./I.U. printed circuit
boards (PCBs) is not loose.
• The connection for thermistors
• The connection for the wired controller cable
• The connection for communication cabling
• Each connection for power source line
Check that the wiring connection on O.U./I.U. PCBs is not loose or
misconnected on the site according to the “Electrical Wiring Diagram” of
the Engineering Manual.
NOTE:
If the fuse(s) on an I.U. PCB is blown, diagnose the cause of overcurrent and replace the fuse(s).
In addition, check the power supply of optional equipment because the fuse(s) may blow due to an external
power supply failure. Turn off the power for safety.
3.1 Initial Troubleshooting
3.1.1 Checking Electrical Wiring and Power Supply
Содержание CICM008B21S
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Страница 10: ...viii SM 18003 ...
Страница 15: ...SM 18003 1 1 INSTALLATION 1 Installation ...
Страница 19: ...SM 18003 2 1 OPERATION 2 Operation ...
Страница 20: ...2 2 SM 18003 OPERATION 2 1 Indoor Unit Refer to the Operation Manual for Mini Cassette ...
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Страница 23: ...SM 18003 3 1 TROUBLESHOOTING 3 Troubleshooting ...
Страница 73: ...MAINTENANCE SM 18003 4 1 4 Maintenance ...
Страница 74: ...MAINTENANCE 4 2 SM 18003 4 1 Maintenance of Outdoor Unit Refer to the Service Manual for Outdoor Unit ...
Страница 99: ...SM 18003 5 1 EXTERNAL INPUT OUTPUT AND FUNCTION SETTING 5 External Input Output and Function Setting ...
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Страница 139: ...SM 18003 6 1 FIELD WORK INSTRUCTIONS 6 Field Work Instructions ...
Страница 148: ...6 10 SM 18003 FIELD WORK INSTRUCTIONS 6 8 Mollier Chart for R410A f t 3 l b ...
Страница 149: ...SERVICE PARTS LIST SM 18003 7 1 7 Service Parts List ...
Страница 150: ...SERVICE PARTS LIST 7 2 SM 18003 Refer to the Service Parts List for Mini Cassette ...
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Страница 152: ... 2018 Johnson Controls Inc SM 18003 Code No LIT 12013034 Issued April 2018 ...