22
Technical Information
Service Manual
◆
When Tamb. ≥Tset+1
℃
, the system operates under cooling
mode. In this case, the compressor, the ODU fan motor and the
IDU fan motor operates at set speed.
◆
When Tamb. ≤Tset-1
℃
, the compressor and the ODU fan
motor stop, while the IDU fan motor operates at set speed.
◆
When Tset-1
℃
<Tamb. <Tset+1
℃
, the system will maintain its
previous operation status.
In cooling mode, the 4-way valve is de-energized (4-way valve is
not available for cooling only unit). Temperature setting range is
16~30
℃
.
(8)I feel control mode
After controller received I feel control signal and ambient
temperature sent by remote controller, controller will work
according to the ambient temperature sent by remote controller.
(9)Entry condition for compulsory defrosting function
When turn on the unit under heating ode and set temperature is
16
O
C (or 16.5
O
C by remote controller), press “
, , , , ,
” button successively within 5s and then indoor unit will enter into
compulsory defrosting setting status:
(1) If theres only indoor units controller, it enters into indoor normal
defrosting mode.
(2) If theres indoor units controller and outdoor units controller,
indoor unit will send compulsory defrosting mode signal to outdoor
unit and then outdoor unit will operate under normal defrosting
mode. After indoor unit received the signal that outdoor unit has
entered into defrosting status, indoor unit will cancel to send
compulsory mode to outdoor unit. If outdoor unit hasnt received
feedback signal from outdoor unit after 3min, indoor unit will also
cancel to send compulsory defrosting signal.
(10)Refrigerant recovery function:
Enter into Freon recovery mode actively: Within 5min after
energization, turn on the unit at 16
O
C under cooling mode, and
press light button for 3 times within 3s to enter into Freon recovery
mode. Fo is displayed and Freon recovery mode will be sent to
outdoor unit.
(11)Ambient temperature display control mode
1. When user set the remote controller to display set temperature
(corresponding remote control code: 01), current set temperature
will be displayed.
2. Only when remote control signal is switched to indoor ambient
temperature display status (corresponding remote control code:
10) from other display status (corresponding remote control code:
00, 01,11),controller will display indoor ambient temperature for 3s
and then turn back to display set temperature.
Under this mode, indoor fan operates at set fan speed.
Compressor, outdoor fan, 4-way valve and electric heating tube
stop operation. Indoor fan can select to operate at high, medium,
low or auto fan speed. Temperature setting range is 16~30
O
C.
(12)Off-peak energization function:
Adjust compressors minimum stop time. The original minimum
stop time is 180s and then we change to:
The time interval between two start-ups of compressor cant be
less than 180+Ts(0≤T≤15). T is the variable of controller. Thats to
say the minimum stop time of compressor is 180s~195s. Read-
in T into memory chip when refurbish the memory chip each time.
After power recovery, compressor can only be started up after
180+T s at least.
(13) SE control mode
The unit operates at SE status.
(14) X-fan mode
When X-fan function is turned on, after turn off the unit, indoor fan
will still operate at low speed for 2min and then the complete unit
will be turned off. When x-fan function is turned off, after turn off
the unit, the complete unit will be turned off directly.
(15) 8
O
C heating function
Under heating mode, you can set 8
O
C heating function by remote
controller. The system will operate at 8
O
C set temperature.
(16)Turbo function
Turbo function can be set under cooling and heating modes.
Press Fan Speed button to cancel turbo setting. Turbo function is
not available under auto, drying and fan modes.
6. Function and Control
