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Hitachi RAS-25CNH1 - Heating Operation Troubleshooting

Hitachi RAS-25CNH1
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– 88 –
Q6
Heating operation
The circulation stops occasionally during the
heating operation.
Even when the fan speed is set to "Hi" or
"Med", the operation starts in the "Lo" mode.
After the Start/stop switch is pressed to
stop heating operation, the outdoor units
still operates with the Operation lamp lit.
This occurs during defrosting. Walt for 5
_
10 minutes
until the outdoor unit is defrosted.
At the begining of the heating operation, the fan speed is
held to "Lo" for 30 seconds. If "Hi" is selected, operation is
done at "Lo" first, then "Med" for 30 seconds and then is
switched to "Hi".
If the external temperature is too high, heating operation
may stop to protect the unit.
Auto fresh defrosting is carried out. The system checks
the outdoor unit and defrosts it if necessary before stop-
ping operation.
Q7
Q8
Q9
Auto fresh defrosting
A6
A7
A8
A9

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