Toyotomi GAN GAG A180IV, Service Manual

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1 Temperature Parameters
Out door exhaust temperature (T
exhaust
)
Out door ambient temperature (T
out- amb.
)
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
in-amb.
-T
preset
) 0.5 , start the unit in cooling mode,in which case,outdoor fan
and compressor start running,and microcomputer will auto adjust the frequency of compressor by cooling capacity requirements.
In cooling running,if 0 (T
preset
-T
in-amb.
) 2 ,the compressor will run at low frequency.
In cooling running,if capacity requirements is 0( unit stop for cooling ),and (T
preset
-T
in-amb
.) 2 ,the compressor will stop,
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
with frequency decline ,and outdoor fan will bestopped in 60S. When antifreeze protection is releasedthe unit will resume its
original operating status.
In cooling or dehumidify mode,if it is detected that the system is under antifreeze protection, the compressor will stop or run
2.1.3 Control Logic of Outdoor Fan
If T
out-amb.
26 ,outdoor fan will run at high speed.
If T
out-amb
. 24 ,outdoor fan will run at low speed.
In running,if 24 T
out-amb.
26 ,the outdoor fan will remain original.
After turning on the unit ,the outdoor fan will be forced to run for 3 min, and then run at logical speed.
Protection function: the same as that in cooling mode.
Temp. setting range:16-30 .
State of 4-way valve: shut-off
Working conditions and Process of dehumidifying:the same as that in cooling 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,
preset
amb.
,
the unit will start heating,in which case,
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
preset
amb.
preset
,the compressor will run at low frequency.
In heating process,if
amb.
preset
，
the compressor will stop running and outdoor fan will stop
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 .
the outdoor fan will run at high speed;
the outdoor fan will run at low speed;
In running process, if
out-amb.
out-amb.
If
If
out-amb.
the speed will remain original.
During running,the outdoor fan will be forced to run at high speed for 3min, and then turn to logical speed.
3.2.4.2 Logic Control of Outdoor Fan
Controller Function of Outdoor Unit
3.2.2 Dehumidifying Mode
3.2.3 Fan Mode