Hitachi RAM-36NP2A, Service Manual, Page: 65 / 87

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SERVICE CALL Q & A
Model RAI-25RPA
RAI-35RPA
RAI-50RPA
COOLING MODE
The compressor has
stopped suddenly during
cooling operation.
Sound of running water is heard from
indoor unit during dehumidifying.
Compressor occasionally does not
operate during dehumidifying.
The circulation stops
occasionally during
Heating mode.
When the fan speed is set
at HIGH or MED, the
fl ow
is actually Weak.
Heating operation stops
while the temperature is
preset at “30”.
Check if the indoor heat
exchanger is frosted.
Wait for 3-4 minutes
until it is defrosted. If the air conditioner operates
in cooling mode when it is
cold, the evaporator may get
frosted.
Normal sound when refrigerant fl ows in pipe.
Compressor may not operate when room
temperature is 10°C or less. It also stops
when the humidity is preset humidity or less.
It occurs during
defrosting. Wait for
5-10 minutes until the
condenser is defrosted.
At the beginning of heating,
the fan speed remains
LOW for 30 seconds.
If HIGH is selected, it
switches to LOW and again
to MED after additional 30
seconds.
If temperature is high
in the outdoor, heating
operation may stop to
protect internal devices.
DEHUMIDIFYING MODE
HEATING MODE
Q1 A1
Q2 A2
Q3 A3
Q4
A4
Q5
A5
Q6
A6