Hitachi RAM-60QH4 Manuel De Service page 8

CAUTION
1. In quiet operation or stopping the running, its heard slight flowing noise of refrigerant
in the refrigerating cycle occasionally, but this noise is not abnormal for the
operation.
2. When it thunders near by, it is recommend to stop the operation and to disconnect
the power cord plug from the power outlet for safety.
3. The room air conditioner dose not start automaticaly after recovery of the electric
power failure for preventing fuse blowing.
minutes from when unit stopped.
4. If the room air conditioner is stopped by adjusting thermostat, or missoperation, and
re-start in a moment, there is occasion that the cooling and heating operation does
not start for 3 minutes, it is not abnormal and this is the result of the operation of
IC delay circuit.
fuse or damaging parts even if operation is restarted accidentally.
5. This room air conditioner should not be used at the cooling operation when the
outside temperature is below 10˚C (50˚F).
6. This room air conditioner (the reverse cycle) should not be used when the outside
temperature is below –15˚C (5˚F).
If the reverse cycle is used under this condition, the outside heat exchanger is
frosted and efficiency falls.
7. When the outside heat exchanger is frosted, the front is melted by operating the hot
gas system, it is not trouble that at this time fan stops and the vapour may rise
from the outside heat exchanger.
8. With this model, lead-free solder is used for P.W.B.. Since the melting point of this
solder is higher than conventional solders, the soldering iron may become too hot
when replacing component on P.W.B., and the component could break. Therefore,
replace P.W.B. for repair except in unavoidable circumstances.
This IC delay circuit ensures that there is no danger of blowing
Re-press START / STOP button after 3
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