Working Conditions And Process Of Cooling; Control Logic Of Outdoor Fan; Working Conditions And Process Of Heating; Logic Control Of Outdoor Fan - Toyotomi GAN GAG A180IV Service Manual

1 Temperature Parameters
Outdoor exhaust temperature (T
Outdoor ambient temperature (T
2 Basic Functions
In each mode,once started,the compressor can not be stopped until it has been running for 6 min.(excluding malfunction
protection and stopping the compressor for mode switching);once stopped,the compressor should be started in 3-min. delay
(including mode switching,stopping the unit for temp. reached or by remote control);the compressor will start after 5S of the indoor fan.
2.1 Cooling Mode

2.1.1 Working Conditions and Process of Cooling

If the compressor is in off status,and (T
and compressor start running,and microcomputer will auto adjust the frequency of compressor by cooling capacity requirements.
In cooling running,if 0
In cooling running,if capacity requirements is 0( unit stop for cooling ),and (T
and outdoor fan will stop running in 60S.
In this mode, switch valve is de-energized,and the temp. can be set in the range of 16-30
2.1.2 Antifreeze Protection
In cooling or dehumidify mode,if it is detected that the system is under antifreeze protection, the compressor will stop or run
with frequency decline ,and outdoor fan will bestopped in 60S. When antifreeze protection is releasedthe unit will resume its
original operating status.

2.1.3 Control Logic of Outdoor Fan

If T 26 ,outdoor fan will run at high speed.
out-amb.
If T . 24 ,outdoor fan will run at low speed.
out-amb
In running,if 24 T
out-amb.
After turning on the unit ,the outdoor fan will be forced to run for 3 min, and then run at logical speed.
3.2.2 Dehumidifying Mode
Working conditions and Process of dehumidifying:the same as that in cooling mode.
State of 4-way valve: shut-off
Temp. setting range:16-30
Protection function: the same as that in cooling mode.
3.2.3 Fan Mode
Compressor, outdoor fan and 4-way valve shut off.
Temp. setting range:16-30
3.2.4 Heating Mode

3.2.4.1 Working Conditions and Process of Heating

If the compressor is in stopped state,
compressor, outdoor fan and 4-way valve will run and the microcomputer will adjust frequency of comprssor according to
heating requirements.
In heating process,if
In heating process,if
running after 60-S delay.
Note:Stop the unit or switch into other mode in heating mode,the 4-way valve will de-energize after the compressor has
stopped for 2 min.
In this mode, the reversal valve is energized and temp.setting range is 16-30

3.2.4.2 Logic Control of Outdoor Fan

If the outdoor fan will run at high speed;
out-amb.
If
the outdoor fan will run at low speed;
out-amb.
In running process, if
During running,the outdoor fan will be forced to run at high speed for 3min, and then turn to logical speed.
Controller Function of Outdoor Unit
)
exhaust
)
out- amb.
-T
in-amb. preset
(T -T ) 2 ,the compressor will run at low frequency.
preset in-amb.
26 ,the outdoor fan will remain original.
.
.
amb.
preset
amb.
amb.
preset
the speed will remain original.
out-amb.
) 0.5 , start the unit in cooling mode,in which case,outdoor fan
preset
preset
,the compressor will run at low frequency.
preset
the compressor will stop running and outdoor fan will stop
-T .) 2 ,the compressor will stop,
in-amb
.
,
the unit will start heating,in which case,
.