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Service Manual
3-141
TROUBLESHOOTING
DIP Switch Setting
Operation
Remarks
Manual
OFF of
Comp.
1. Setting
*Compressor Manual OFF:
Set DSW4-4 ON.
2. Canceling
*Compressor ON:
Set DSW4-4 OFF.
1. When DSW4-4 is ON during
compressor operation,
the compressor stops operating
immediately and the indoor unit
is under the condition of Thermo-
OFF.
2. When DSW4-4 is OFF,
the compressor starts operating
after the cancellation of three-
minutes guard.
* Do not repeat compressor ON/OFF
frequently.
Manual
Defrost
1. Manual Defrost Operation
Press PSW5 for more than three
seconds during heating operation,
and the defrosting operation starts
after two minutes.
This function is not possible within
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operation.
2. Manual Defrost Operation Completion
Defrosting operation automatically
ends and the heating operation
restarts.
1. Defrosting operation is available
regardless of frost condition and
total time of heating operation.
2. Defrosting operation is not
performed when the temperature
of outdoor heat exchanger is
higher than 50
o
F(10
o
C), high
pressure is higher than 3.3MPa
or the unit is Thermo-OFF.
* Do not continuously repeat defrosting
operation.
* When manual defrosting operation is
accepted by PSW5, the time left before
starting defrosting operation is indicated
on the 7-segment display on the PCB.
ON
OFF
1 2 3 4 5 6
When the test run operation is complete, turn all switches of DSW4 OFF.
(1) If the wired controller is set to a different mode, the test run function will not start.
In this case, perform the following actions before the test run.
Wired Controller: STOP
Central Station: STOP and Wired Controller is available mode.
COOL/HEAT Change-Over Switch: Connector (CN17) of outdoor unit PCB is open.
During the test run mode, do not control the wired controller, the central station and cool/heat change-
over switch. Otherwise, the operation mode will be changed or the test run will end.
If necessary, control them after the test run is complete.
(2) If an alarm code is indicated during the test run, reset the system by turning the main power supply
OFF, then back ON. The system should then operate.
ON
OFF
1 2 3 4 5 6
Time Left (Every Four Seconds)
NOTE:
Thermo-ON: The outdoor unit and some indoor units are running.
Thermo-OFF: The outdoor unit and some indoor units stay on, but don't run.
Содержание YVAHP072B31S
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Страница 17: ...Service Manual 1 1 INSTALLATION 1 Installation ...
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Страница 577: ...Service Manual 1 561 INSTALLATION 9 Touch Back to return to the Service Menu screen 9 ...
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Страница 921: ...Service Manual 2 1 OPERATION 2 Operation ...
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Страница 1184: ...2 264 Service Manual OPERATION 7 Touch on Return to Group sel to return to Setting Group Selection 7 ...
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Страница 1461: ...Service Manual 4 1 MAINTENANCE 4 Maintenance ...
Страница 1657: ...Service Manual 5 1 EXTERNAL INPUT OUTPUT AND FUNCTION SETTING 5 External Input Output and Function Setting ...
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Страница 1729: ...Service Manual 6 1 FIELD WORK INSTRUCTIONS 6 Field Work Instructions ...
Страница 1738: ...6 10 Service Manual FIELD WORK INSTRUCTIONS 6 8 Mollier Chart for R410A ft 3 l b ...
Страница 1739: ...SERVICE PARTS LIST Service Manual 7 1 7 Service Parts List ...
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Страница 1796: ... 2015 Johnson Controls Inc SM 15001 ...