Service Manual
2-51
OPERATION
8.
Troubleshooting
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Phenomenon
Cause and Action
Operation Stopped
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wired controller are turned
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The micro-computer is activated to protect the
device from electromagnetic interference. Restart
the operation.
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ON the wired controller.
The operation has stopped automatically because
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indoor units connected to the same controller are
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Restart the operation. If the instantaneous power
failure is within 2 seconds, the operation restarts
automatically.
White Steam
from Indoor Unit
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dried.
White Smoke
from Indoor Unit
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Season
This might occur when dust attached to the heat
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Mist from Indoor Unit
In Restaurant or Kitchen
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During Dry Operation
This might occur due to the air outlet temperature
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This might occur due to the air outlet temperature
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volume.
Odor from Indoor Unit
Odors Emanating from Indoor
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The intake of cigarette smoke is the likely reason,
with nicotine deposits coating or clogging the cells
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Sound from Indoor Unit
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when starting or stopping the
operation.
This is the sound made when the components
are rubbing up against one another due to the
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brought on by temperature change.
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bubbling is heard during the
operation.
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or the drain-up mechanism drains water. The sound
may be heard especially when starting the operation
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heard temporarily right after
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It is generated because the fan motor makes
temporary sound by change of fan speed.
Dew Condensation on
Air Panel
Dew condensation on
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or Dew Drops
This might occur when the operation is performed
in a humid environment over a prolonged period of
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Temperature Irregularity
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for each outlet.
This might occur for structural reasons, such as
the size of an air outlet and the location of heat
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“HOT-START” on LCD Illuminated (ON)
This might occur according to the operation mode
or operational conditions.
Operation Mode on LCD Flashing
Summary of Contents for YVAHP072B31S
Page 2: ......
Page 10: ...viii Service Manual ...
Page 16: ......
Page 17: ...Service Manual 1 1 INSTALLATION 1 Installation ...
Page 577: ...Service Manual 1 561 INSTALLATION 9 Touch Back to return to the Service Menu screen 9 ...
Page 920: ......
Page 921: ...Service Manual 2 1 OPERATION 2 Operation ...
Page 1315: ...Service Manual 3 1 TROUBLESHOOTING 3 Troubleshooting ...
Page 1461: ...Service Manual 4 1 MAINTENANCE 4 Maintenance ...
Page 1728: ......
Page 1729: ...Service Manual 6 1 FIELD WORK INSTRUCTIONS 6 Field Work Instructions ...
Page 1738: ...6 10 Service Manual FIELD WORK INSTRUCTIONS 6 8 Mollier Chart for R410A ft 3 l b ...
Page 1739: ...SERVICE PARTS LIST Service Manual 7 1 7 Service Parts List ...
Page 1795: ......
Page 1796: ... 2015 Johnson Controls Inc SM 15001 ...