High-Pressure Protection By High-Pressure Make-Or-Break Device; Compressor Motor Protection; Control Of The Closing And Opening Of The Service Valve - Mitsubishi FDC 6 Series Service Manual

6) High-pressure protection by high-pressure make-or-break device (63H
(Only case of FDCP208~508 and FDC808, 1008 type)
a) If the pressure rises and 63H
restarted. An abnormal stop is performed when 63H
after repairing.
b) An abnormal stop is performed at the first occurrence if 63H
the compressor was stopped.
Note (1) Once 63H
7) Compressor motor protection (Only case of FDC808, 1008 type)
The same detection control as 63H
the compressor motor. The setting values of the internal thermostat 49C are 90 °C open and 73 °C close.
8) Control of the closing and opening of the service valve (Only heat pump type)
a) When the compressor is ON for the first time after turning on the power, the heating operation starts regardless of any setting.
b) If the 63H turns OFF(open) within 10 seconds after the compressor is ON, the power will turn off as abnormal stop.
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c) To recover from the abnormal stop, turn on the power again after the 63H
d) If the 63H doesn't turn OFF(open) within 10 seconds after the compressor is ON, the operation immediately changes to the
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"set mode" to start normal operation.
9) Test run
a) For a test run, it is possible to use the dip switches SW5-3 and SW5-4 on the printed circuit board in the outdoor unit.
ON SW5-4
SW5-3
OFF Normal
b) Test run time is 30 minutes. Protective devices are effectively controlled.
is operated (opened), the compressor is stopped. After a 3-minute delay, the compressor is
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has been restored after an abnormal stop, the unit can be restarted using the remote control.
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will be performed when the internal thermostat 49C operates due to a rise in the windings of
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OFF Test run for cooling
ON Test run for heating
)
1
is opened five times within 60 minutes of the first operation. e Restore
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remains open after 60 minutes have passed from the first time
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is ON(closed).
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