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[
IX
Troubleshooting ]
3
Heat source unit stops at times
during operation.
The first stop is not considered as an
error, as the unit turns to anti-restart
mode for 3 minutes as a preliminary
error.
Error mode
(i) Abnormal high pressure
(ii) Abnormal discharge air
temperature
(iii) Heatsink thermistor failure
(iv) Thermistor failure
(v) Pressure sensor failure
(vi) Over-current break
(vii) Refrigerant overcharge
Note: Frost prevention tripping only
under cooling mode may be
considered in addition to the
above. (Freeze protection is
detected by one or all indoor
units.)
Note: Even the second stop is not
considered as an error
when some specified errors
occur. (eg. The third stop is
considered as an error
when the thermistor error
occurs.)
(1) Check the mode operated in the past
by displaying preliminary error history
on LED display with SW1.
(2) Reoperate the unit to find the mode that
stops the unit by displaying preliminary
error history on LED display with SW1.
->Refer to the reference page for each
error mode.
*Display the indoor piping temperature
table with SW1 to check whether the
freeze proof operation runs properly,
and check the temperature.
Phenomena
Cause
Check method and remedy
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