mundoclima MUCO-H6T Service Manual page 28

Service Manual
( 3 ) Heating Mode ( this mode is not available for c ooling only un it)
1. Working condition and process for heating
When Tamb. Tpreset-1 , the unit will run in heating mode. Meanwhile, compressor and outdoor fan will start running. Indoor fan may
be start running after delayed for a period of time to prevent blowing out cold air. If the unit turns to heating mode for the first time or
switches to heating mode from other modes, the four-way valve will be energized after compressor was started up for the first time for 20s.
When Tamb.≥ Tpreset+1 , compressor and outdoor fan will stop running. The four-way valve is energized all the same and indoor fan
will stop running after running at low fan speed for 10s;
When Tpreset-1 <Tamb.<Tpreset+1 , the unit will keep original running status;
In this mode, the temperature setting range is 16 ~30
switching to other modes from heating mode, the four-way valve will be de-energized after 2mins delayed.
When turning off the unit, if the complete unit is at running status in heating mode, the unit will stop running when reaching the
setting temperature and the unit will be turned off after lowing residual heat for 10s. If the unit is at the status of blowing residual
heat when the unit is stopped after reaching the temperature point, the unit will continue to blow residual heat and then it will be
turned off; if the unit is stopped after reaching the temperature and indoor fan is stopped, the unit will be turned off directly without
blowing residual heat.
2. Defrosting condition and process
System will defrost intelligently and automatically. When it's detected that the system is reached the defrosting condition, the system will
turn to defrosting status;
After defrosting is started up, H1 will be
indoor fan and outdoor fan will stop running after 1min delayed. 3mins later, the four-way valve will be closed. After four-way valve has
closed for 30s, compressor will be started up.
After defrosting is finished, compressor will stop running, while the four-way valve will be start up. 30s later, compressor and outdoor fan
will be restarted up and turn to the next periods. Indoor fan is running at anti cold air status.
Defrosting time can't exceeds 12mins at the most.
3. Working condition for auxiliary heating
Auxiliary heating can be turned on/off by buttons.
If auxiliary heating is at ON status, when indoor fan is running, and indoor ambient temperature and air discharge temperature are low,
auxiliary heater will start running;
When indoor fan isn' t running, or indoor ambient temperature is high, or air discharge temperature is high, auxiliary heater will stop
running. Once the auxiliary heater is stopped, it can only be restarted up after 2mins delayed.
If auxiliary heating is set OFF, the auxiliary heating will be turned off directly.
4 Fan Mo de
Indoor fan is running at setting fan speed:
The temperature setting range is 16 ~30
( 5 ) Auto Mode
In this mode, the system will select the running mode (cooling, dry, heating, fan) automatically according to the change of ambient
temperature.
Once the mode is started up, the unit will only switch to the running status under auto mode according to Tamb after it has run for
30s at least.
Tpreset+1
Tpreset -1
6mins
compressor
outdoor fan
indoor fan
anti cold air
reversing valve
run
displayed. If there's auxiliary heating,
auto fan speed
and the initial value is 25 .
and the initial value is 25 . When tuning off the unit in heating mode or
3mins 6mins
setting fan speed
10S
10S
low fan speed
low fan speed
anti cold air
stop
auxiliary heating will be stopped and then compressor,
low fan speed medium fan speed
28
stop heating
original running status
start heating
high fan speed