Fujitsu AO G12KBTB Series User Manual

6-4. Compressor preheating
By preheating the compressor, warm airflow is quickly discharged when the operation is started.
• Triggering condition
– 30 minutes after compressor stopped.
– Outdoor unit heat exchanger temperature (Tn)
-2°C
Off
On
Tn
Tn
-4°C
When the jumper wire (JM2) is disconnected:
5°C
Off
On
Tn
Tn
7°C
6-5. External electrical heater control
The external electrical heater is operated as below.
When the room
temperature rises
When the room
temperature drops
Ts: Setting temperature
Heater : Off
Heater : On
Heater : Off
Ts -10°C
Ts -1°C
Ts -3°C
Ts -12°C
NOTES:
• When the compressor stop, external electric heater is off.
• It operates only in heating mode and when the indoor fan operates. (However, S-LOW is exclud-
ed.)
6-6. Electronic expansion valve control
The most proper opening of the electronic expansion valve is calculated and controlled under the
present operating condition based on the table below.
Operation mode Pulse range
Cooling/dry mode
Between 52 and 480 pulses
Heating mode
NOTE:
At the time of supplying the power to the outdoor unit, the initialization of the electronic ex-
pansion valve is operated (528 pulses are input to the closing direction).
6-4. Compressor preheating
- (01-24) - 6. Various control
CONTROL AND FUNCTIONS CONTROL AND FUNCTIONS

Fujitsu AO G12KBTB Series Specifications

General

Brand	Fujitsu
Model	AO G12KBTB Series
Category	Air Conditioner
Language	English