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Error log and reset
Error indicator
Memorized error log
Reset
Remote controller display
• Higher priority error is memorized.
• Stop the unit by pressing the ON/OFF
switch of remote controller.
• If the unit has recovered from anomaly, it
can be operated.
Red LED on indoor control PCB
• Not memorized.
Red LED on outdoor control PCB
• Memorizes a mode of higher priority.
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Resetting the error log
• Resetting the memorized error log in the remote controller
Holding down “CHECK” button, press “TIMER” button to reset the error log memorized in the remote controller.
• Resetting the memorized error log
The remote controller transmits error log erase command to the indoor unit when “VENTI” button is pressed while
holding down “CHECK” button.
Receiving the command, the indoor unit erase the log and answer the status of no error.
(2) Troubleshooting procedure
When any trouble has occurred, inspect as follows. Details of respective inspection method will be described on later pages.
Trouble
Confirmation
of power
supply
(Indoor/
outdoor unit)
Confirmation of
remote controller and
LEDs on the PCB
of indoor unit and
outdoor unit (Indoor/
outdoor unit, remote
controller)
Check of the anomalous
operation data on the
remote controller
Inspection
of the unit/
controller
Replacement/
repair of
faulty part,
test run,
adjustment
(3) Troubleshooting at the indoor unit
With the troubleshooting, find out any defective part by checking the voltage (AC, DC), resistance, etc. at respective connectors
at around the indoor PCB, according to the inspection display or operation status of unit (the compressor does not run, fan does
not run, the 4-way valve does not switch, etc.), and replace or repair in the unit of following part.
(a) Replacement part related to indoor PCB’s
Control PCB, power supply PCB, temperature thermistor (return air, indoor heat exchanger), remote controller switch,
limit switch, transformer and fuse
Note (1) With regard to parts of high voltage circuits and refrigeration cycle, judge it according to ordinary inspection methods.
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