Hitachi RAM-40QH5 Service Manual page 33

FORCED COOLING
In order to accumulate refrigerant, units operate in cooling cycle.
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Execution condition and operation status are shown below.
[Execution condition]
With neither indoor unit 1 and 2 not operated, when forced cooling switch is turned ON, forced cooling will
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be performed.
Always operation status of indoor unit are monitored and forced cooling is inhibited when operation of
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any unit is detected.
[Operation status]
Outdoor unit fan: Fixed in LO.
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Compressor rotation speed: Fixed in 3900min
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[Note]
During forced cooling, if failure occurs in outdoor unit, thermostat is turned off. However, it is not counted.
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Since rotation speed of compressor is fixed in 3900min
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control at start is not performed.
–1 .
–1 during forced cooling, compressor fixed speed
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