External Electrical Heater Control; Low Noise Operation - Fujitsu ARG60LHTA Service Instruction

1-22. EXTERNAL ELECTRICAL HEATER CONTROL

The External Electrical Heater operates when it meets all the following conditions.
Model type : Heat pump
Operation mode : Heating mode
Compressor : ON
Indoor fan : ON
(Fig 15 : External Electrical Heater control)
Ts -3°C
Ts -12°C
When the room
temperature drops

1-23. LOW NOISE OPERATION

The compressor speed and the outdoor unit fan speed are limited to reduce the operation noise
by External Input.
During the LOW NOISE OPERATION,
"CURRENT OVERLOAD OPERATION", "ECONOMY OPERATION" and "PEAK CUT OPERATION"
are effective, and the outdoor unit operates by lowest current of them.
However, during the DEFROST OPERATION, the compressor operates by the speed
for DEFROST OPERATION.
( Table 19 : Detail of Low Noise Operation )
Low Noise mode
LEVEL 1
LEVEL 2
LEVEL 3
*The performance drops when operating in the
AMP Air Conditioning
When the room
temperature rises
Heater : OFF
Heater : ON
Heater : OFF
Outdoor Fan
Upper Limit Speed
( rpm )
520
Cooling
520
Heating
520
Cooling
520
Heating
520
Cooling
520
Heating
Ts -1°C
Ts -10°C
Ts : Setting temperature
Compressor
Speed ( rps )
58
58
37
39
27
33
LOW NOISE OPERATION
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