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SM-16007
3-39
TROUBLESHOOTING
3.2.2 Troubleshooting Using Alarm Codes
Alarm
Code
Activation of Protection Device (Float Switch) in Indoor Unit
O
7KH581LQGLFDWRUUHGÀDVKHV
O
The indoor unit number (Ref. system number - I.U. number), the alarm code, the model code*
1)
, the
model name*
1)
and the number of connected indoor units are displayed on the LCD. The alarm code is
ÀDVKHGRQWKHVHJPHQWGLVSOD\RIWKHRXWGRRUXQLW3&%
*1) Except for some models.
+
Example of 4-way Cassette Type
This alarm code is displayed when the contact between #1 and #2 of CN14 on the I.U. PCB is opened
for over 120 seconds during the cooling, dry, fan, or heating operation.
I.U. PCB: Indoor Unit PCB
Turn OFF power supply and remove
connectors CN36 and CN14 on I.U. PCB.
Then turn ON power supply. Is DC12.5~
13.5V applied between CN36 terminals?
Turn OFF power supply and connect
connector CN14 on I.U. PCB. Then
turn ON power supply. Is voltage applied
between CN36 terminals less than 12.5V?
Failure of I.U. PCB
Failure of Drain Pump
Activation of Float Switch FS
or Failure of Float Switch.
Yes
Make sure short circuit does not occur between CN36 terminals
when measuring the voltage. Short circuit will lead to I.U. PCB
malfunction.
Yes
No
No
Indication on Outdoor Unit PCB (SEG1)
Alarm Code
Содержание YVAHP0721CW Series
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Страница 15: ...SM 16007 1 1 INSTALLATION 1 Installation ...
Страница 163: ...SM 16007 2 1 OPERATION 2 Operation ...
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Страница 165: ...SM 16007 3 1 TROUBLESHOOTING 3 Troubleshooting ...
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Страница 285: ...SM 16007 4 1 MAINTENANCE 4 Maintenance ...
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Страница 361: ...SM 16007 5 1 EXTERNAL INPUT OUTPUT AND FUNCTION SETTING 5 External Input Output and Function Setting ...
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Страница 391: ...SM 16007 6 1 FIELD WORK INSTRUCTIONS 6 Field Work Instructions ...
Страница 400: ...6 10 SM 16007 FIELD WORK INSTRUCTIONS 0ROOLHU KDUW IRU 5 ft 3 l b ...
Страница 401: ...SERVICE PARTS LIST SM 16007 7 1 7 Service Parts List ...
Страница 416: ... 2016 Johnson Controls Inc SM 16007 Code No LIT 12012400 Issued November 2016 ...