External Electrical Heater Control; Coil Dry Operation Control; Defrost Operation Control - Fujitsu AB*14LBAJ Service Instruction

16. EXTERNAL ELECTRICAL HEATER CONTROL (For AR type)
The external electrical heater is operated as shown in Figure 12.
(Fig.12 : External electrical heater control)
Ts -3°C
Ts -12°C
When the room
temperature drops
17. COIL DRY OPERATION CONTROL (For AS*A/ AG*F type)
The coil-dry operation functions by pressing COIL DRY button on the remote controller.
The coil-dry operation is consisted of 3 cycles of [Fan operation 3 minutes / Heating operation
2 minutes], and Fan operates for 3 minutes at last before ending the air conditioner operation.
(It takes 18 minutes to complete the coil-dry operation.)

18. DEFROST OPERATION CONTROL

1. CONDITION OF STARTING THE DEFROST OPERATION
The defrost operation starts when the outdoor heat exchanger temperature sensor detects
the temperature lower than the values shown in Table 7.
(Table 7 : Condition of starting Defrost Operation)
Compressor integrating
operation :Less than 45min.
Does not operate
2. CONDITION OF THE DEFROST OPERATION COMPLETION
Defrost operation is released when the conditions become as shown in Table 8.
(Table 8 : Defrost Release Condition)
Outdoor heat exchanger temperature sensor value is higher than 10°C or
Compressor operation time has passed 15 minutes.
When the room
temperature rises
Heater : OFF
Heater : ON
Heater : OFF
Compressor integrating
operation :45min and over
After 6 min. *1
Less than 6 min. *1
or 10min. *2
Release Condition
Ts : Setting temperature
Ts -1°C
When the compressor stop,
External electrical heater is OFF.
Ts -10°C
*1. It means contiguous operation time.
or 10min. *2
*2. Compressor stop time:
-8°C *3
-12°C *4
-14°C *5 *3. Outdoor temp. > 3°C
-16°C *6
*4. 3 > Outdoor temp. > -1°C
=
*5. -1 > Outdoor temp. > -5°C
=
*6. Outdoor temp. < -5°C
01-25
Below 20min. Select 6min.
Above 20min. Select 10min.