Daikin FTXV25AV1B Service Manual page 33

Protection function
Overcurrent protection
SiK011003
If total current is high, the compressor will run in limited frequency. If total current is too high, the compressor will stop, the
outdoor fan will delay 30 seconds to stop, indoor unit will display E5 and outdoor
auto mode from dry mode.
Antifreezing protection
② The indoor unit displays the operation icon, operation mode icon and set temperature, but set temperature can't be adjusted.
When the antifreezing protection is detected, the compressor will stop, the outdoor fan will stop after 30 seconds, and the
③ Protection functions are the same as those in any other mode. (See function protection of this section)
indoor fan and swing motor will keep running in the original mode. When antifreezing protection is eliminated and the
1.1.2.2 Fan mode
compressor has stopped for 3 minutes, the compressor will resume running in the original mode.
① Fan conditions and process
In this mode, IDU fan motor runs at set speed while the compressor and ODU fan motor stop operation. The 4-way valve is de-
energized. Temperature setting range is 16 ～ 30℃ .
② The indoor unit displays operation icon and set temperature.
③ Protection functions (See function protection of this section)
1.1.3 Dehumidifying Mode
Working conditions and process of dehumidifying
If T . T , the unit will enter cooling and dehumidifying mode, in which case the compressor and the outdoor fan will operate
amb preset
and the indoor fan will run at low speed.
If T -2 T
preset amb
If T .< T -2 , the compressor will stop, the outdoor fan will stop with a time lag of 30s, and the indoor fan will operate
amb preset
at low speed.
Protection
Protection is the same as that under the cooling mode.
1.1.4 HEAT mode
The condition and process of heating
If T ≤T +2 , HEAT mode will act, the compressor, outdoor fan and reversal valve will run, the indoor fan will delay 3min to
amb preset
stop at the latest
If T +2˚C < T
preset amb
If T ≥T +5˚C , the compressor will stop, the outdoor fan will delay 30sec to stop and indoor fan will blow 60S at low speed,
amb preset
the fan speed cannot be shifted within blow residual heat.
In this mode, the temperature setting range is 16
The air conditioner will adjust the running frequency of the compressor automatically according to the change of ambient temperature.
When the unit is turned off in HEAT mode, or switched to other mode from HEAT mode, the four-way valve will be powered
off after the compressor stops.
The condition and process of defrosting
When frost is detected in the condenser, the system will enter into defrosting state. When defrosting starts, the compressor and
indoor fan will stop, and the outdoor fan and four-way valve will delay 30 seconds to stop. The compressor will start after 15 seconds
and then defrosting will be started. When the compressor has run for 7 minutes or defrosting is finished, the compressor will stop.
After 30 seconds the four-way valve opens and after another 60 seconds, the compressor and outdoor fan resume running. The
indoor fan will delay 3 minutes to run at the latest.
Protection function
③
Anti-cold-wind protection
Function and Control
Compressor
Outdoor fan
Indoor fan
Run
. T , the compressor remains at its original operation state.
preset
< T +5˚C ,the unit will keep running in the original mode.
preset
T +5
preset
T +2
preset
T .
amb
m i
Compressor
Outdoor fan
Indoor fan min.
Reversing
valve
Run
Four-way valve
Compressor
Outdoor Unit
Indoor Unit
During antifreeze protection
min
Preset speed
Stop
~30 .
min.
. n m i . n
preset wind
min. preset wind
Stop
The period of defrosting
30s 30s
7min
60s
15s
30s
Run Stop
yellow light will blink 5 times.
Stop heating
Original operating status
Start heating
3min Set fan speed
Function and Control
25