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105
16.3.4 Low Temperature Compressor Oil Return Control
In heating operation, if the outdoor temperature falls below -10°C when compressor starts, the compressor
frequency will be regulated up to 600 seconds.
16.3.5 Cold Draught Prevention Control
When indoor pipe temperature is low, cold draught operation starts where indoor fan speed will be reduced.
16.3.6 Deice
Operation
When outdoor pipe temperature and outdoor air temperature is low, deice operation start where indoor fan motor
and outdoor fan motor stop and operation LED blinks.
16.3.7 Low Pressure Protection Control
During low ambient heating operation, if the pipe temperature drops below -24°C, the max frequency will be
reduced and limited.
If it does not rises after 3 minutes, the compressor will stop.
The compressor will start again if the pipe temperature rises above -20°C.
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17. Servicing
Mode
17.1 Auto OFF/ON Button
1 AUTO OPERATION MODE
The Auto operation will be activated immediately once the Auto OFF/ON button is pressed. This operation
can be used to operate air conditioner with limited function if remote control is misplaced or malfunction.
can be used to operate air conditioner with limited function if remote control is misplaced or malfunction.
2 TEST RUN OPERATION (FOR PUMP DOWN/SERVICING PURPOSE)
The Test Run operation will be activated if the Auto OFF/ON button is pressed continuously for more than
5 seconds. A “beep” sound will heard at the fifth seconds, in order to identify the starting of Test Run
operation (Forced cooling operation). Within 5 minutes after Forced cooling operation start, the Auto OFF/ON
button is pressed for more than 5 seconds. A 2 “beep” sounds will heard at the fifth seconds, in order to
identify the starting of Forced heating operation.
The Auto OFF/ON button may be used together with remote control to set / change the advance setting of air
conditioner operation.
5 seconds. A “beep” sound will heard at the fifth seconds, in order to identify the starting of Test Run
operation (Forced cooling operation). Within 5 minutes after Forced cooling operation start, the Auto OFF/ON
button is pressed for more than 5 seconds. A 2 “beep” sounds will heard at the fifth seconds, in order to
identify the starting of Forced heating operation.
The Auto OFF/ON button may be used together with remote control to set / change the advance setting of air
conditioner operation.
Auto Operation
Test Run Operation
(Forced Cooling Operation)
Test Run Operation
(Forced Cooling Operation)
Remote Control Number
Switch Mode
Remote Control Receiving
Sound OFF/ON
Auto OFF/ON button
pressed
Beep x 4
Beep x 3
Beep Beep
x
2
5 sec
8 sec
11 sec
16 sec
Main unit always continue Test Run (forced cooling) operation.
Press “AC RESET”
at remote control
Press “AC RESET”, then any
key at remote control
Press “AC RESET”
at remote control
3 REMOTE CONTROL NUMBER SWITCH MODE
The Remote Control Number Switch Mode will be activated if the Auto OFF/ON button is pressed
continuously for more than 11 seconds (3 “beep” sounds will occur at 11th seconds to identify the Remote
Control Number Switch Mode is in standby condition) and press “AC RESET” button and then press any
button at remote control to transmit and store the desired transmission code to the EEPROM.
There are 4 types of remote control transmission code could be selected and stored in EEPROM of indoor
unit. The indoor unit will only operate when received signal with same transmission code from remote control.
This could prevent signal interference when there are 2 or more indoor units installed nearby together.
To change remote control transmission code, short or open jumpers at the remote control printed circuit
board.
continuously for more than 11 seconds (3 “beep” sounds will occur at 11th seconds to identify the Remote
Control Number Switch Mode is in standby condition) and press “AC RESET” button and then press any
button at remote control to transmit and store the desired transmission code to the EEPROM.
There are 4 types of remote control transmission code could be selected and stored in EEPROM of indoor
unit. The indoor unit will only operate when received signal with same transmission code from remote control.
This could prevent signal interference when there are 2 or more indoor units installed nearby together.
To change remote control transmission code, short or open jumpers at the remote control printed circuit
board.
JB
JA
Remote Control Printed Circuit Board
Jumper A (J-A)
Jumper B (J-B)
Remote Control No.
Short Open
A
(Default)
Open Open B
Short Short C
Open Short D
During Remote Control Number Switch Mode, press any button at remote control to transmit and store
the transmission code to the EEPROM.
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4 REMOTE CONTROL RECEIVING SOUND OFF/ON MODE
The Remote Control Receiving Sound OFF/ON Mode will be activated if the Auto OFF/ON button is pressed
continuously for more than 16 seconds (4 “beep” sounds will occur at 16th seconds to identify the Remote
Control Receiving Sound Off/On Mode is in standby condition) and press “AC Reset” button at remote
control.
Press “Auto OFF/ON button” to toggle remote control receiving sound.
continuously for more than 16 seconds (4 “beep” sounds will occur at 16th seconds to identify the Remote
Control Receiving Sound Off/On Mode is in standby condition) and press “AC Reset” button at remote
control.
Press “Auto OFF/ON button” to toggle remote control receiving sound.
o
Short “beep”: Turn OFF remote control receiving sound.
o
Long “beep”: Turn ON remote control receiving sound.
After Auto OFF/ON Button is pressed, the 20 seconds counter for Remote Control Receiving Sound OFF/ON
Mode is restarted.
17.2 Heat Only Operation
17.2.1 How
to
Activate/Deactivate Heat only Operation
AUTO SW
is pressed
Emergency
Operation
Operation
Forced
Cooling
Operation
Cooling
Operation
Forced
Cooling
Operation
Cooling
Operation
Forced
Heating
Operation
Heating
Operation
Remote
Control
Number
Switch
Mode
Control
Number
Switch
Mode
Remote
Control
Receiving
Sound
OFF/ON
Control
Receiving
Sound
OFF/ON
*Operation
Time Check
Mode
Time Check
Mode
No
Setting
Mode
Setting
Mode
Heat Only
Mode
Enable/
Disable
Mode
Enable/
Disable
AC reset code
AC reset code
AC reset code
AC reset code
AC reset code
CHECK
code
Beep
5s
8s
11s
16s
21s
26s
36s
BeepBeep
BeepBeepBeep BeepBeepBeepBeep
Beep
No
The unit will operate under forced cooling
mode continuously if “AC reset” code is
not pressed to activate standby
To enable the “Heat Only” mode, press the AUTO OFF/ON SW for more than 8s and less than 11s, “Beep Beep”
sound will be heard, then release the AUTO OFF/ON SW and press remote controller CHECK button. A short
“Beep” sound will be heard. “Heat Only” mode is now enable.
“Beep” sound will be heard. “Heat Only” mode is now enable.
To disable the “Heat Only” mode, press the AUTO OFF/ON SW for more than 8s and less than 11s, “Beep Beep”
sound will be heard, then release the AUTO OFF/ON SW and press remote controller CHECK button. A long
“Beep” sound will be heard. “Heat Only” mode is now disable.
“Beep” sound will be heard. “Heat Only” mode is now disable.
To pump down the unit during Heat Only Operation press AUTO switch for 5 seconds.
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17.2.2 Operation
mode
during Heating Only Operation
The table below shows the operation mode comparison when Heating Only Operation Mode Activated and
Deactivated.
Operation
Mode
Heating Only Operation Mode Activated
Heating Only Operation Mode Deactivated
AUTO
After 30s sampling, regardless of the indoor intake or
outdoor intake temperature judgment, the unit will run
Heating operation.
outdoor intake temperature judgment, the unit will run
Heating operation.
After 30s sampling, the unit will judge the operation
mode base on remote controller temperature setting and
Indoor Intake Sensor (New Auto Mode) or Outdoor
Intake Sensor (Old Auto Mode).
mode base on remote controller temperature setting and
Indoor Intake Sensor (New Auto Mode) or Outdoor
Intake Sensor (Old Auto Mode).
HEAT
The unit will run Heating operation.
The unit will run Heating operation.
COOL
The unit will stop and Power LED blinking.
The unit will run Cooling operation.
DRY
The unit will stop and Power LED blinking.
The unit will run Cooling Dry operation.
NANOE
Stand-alone
The unit will stop and Power LED blinking.
The unit will run Nanoe Stand-alone operation.
Force Cooling
The unit will run Force Cooling Operation for
X_CTRYTM [15] minutes
X_CTRYTM [15] minutes
The unit will run Force Cooling operation.
Force Heating
The unit will run Force Heating operation.
The unit will run Force Heating operation.
AUTO
(with Timer)
The unit will turn ON by the timer and run Auto
Operation. After 30s sampling, regardless of the indoor
intake or outdoor intake temperature judgment, the unit
will run Heating operation.
Operation. After 30s sampling, regardless of the indoor
intake or outdoor intake temperature judgment, the unit
will run Heating operation.
The unit will turn ON by the timer and run Auto
Operation. After 30s sampling, the unit will judge the
operation mode base on remote controller temperature
setting and Indoor Intake Sensor (New Auto Mode) or
Outdoor Intake Sensor (Old Auto Mode).
Operation. After 30s sampling, the unit will judge the
operation mode base on remote controller temperature
setting and Indoor Intake Sensor (New Auto Mode) or
Outdoor Intake Sensor (Old Auto Mode).
HEAT
(with Timer)
The unit will turn ON by the timer and run Heating
Operation.
Operation.
The unit will turn ON by the timer and run Heating
Operation.
Operation.
COOL
(with Timer)
The unit will not turn ON by the timer. Power LED
blinking.
blinking.
The unit will turn ON by the timer and run Cooling
Operation.
Operation.
DRY
(with Timer)
The unit will not turn ON by the timer. Power LED
blinking.
blinking.
The unit will turn ON by the timer and run Cooling Dry
Operation.
Operation.
Cooling
Test Mode
The unit will stop and Power LED blinking.
The unit will operate according to specify Cooling test
mode operation parameter.
mode operation parameter.
Heating
Test Mode
The unit will operate according to specify Heating test
mode operation parameter.
mode operation parameter.
The unit will operate according to specify Heating test
mode operation parameter.
mode operation parameter.
17.3 Remote Control Button
17.3.1 SET
Button
To check remote control transmission code and store the transmission code to EEPROM:
o Press “Set” button by using pointer.
o Press “Timer Set” button until a “beep” sound is heard as confirmation of transmission code changed.
o Press “Timer Set” button until a “beep” sound is heard as confirmation of transmission code changed.
To limit set temperature range for COOL & DRY, HEAT mode.
o Press “Set” button by using pointer.
o Press TEMP increment or decrement button to choose No. 3.
o Press Timer increment or decrement button to select desired temperature low limit of set temperature for
o Press TEMP increment or decrement button to choose No. 3.
o Press Timer increment or decrement button to select desired temperature low limit of set temperature for
COOL & DRY mode.
o Press Timer Set button to confirm low limit selection.
o Press TEMP increment or decrement button to choose No. 4.
o Press Timer decrement or increment button to select desired temperature high limit of set temperature for
o Press TEMP increment or decrement button to choose No. 4.
o Press Timer decrement or increment button to select desired temperature high limit of set temperature for
COOL & DRY mode.
o Press Timer Set button to confirm high limit selection.
o Press TEMP increment or decrement button to choose No. 5.
o Press Timer increment or decrement button to select desired temperature low limit of set temperature for
o Press TEMP increment or decrement button to choose No. 5.
o Press Timer increment or decrement button to select desired temperature low limit of set temperature for
HEAT mode.
o Press Timer Set button to confirm low limit selection.
o Press TEMP increment or decrement button to choose No. 6.
o Press Timer decrement or increment button to select desired temperature high limit of set temperature for
o Press TEMP increment or decrement button to choose No. 6.
o Press Timer decrement or increment button to select desired temperature high limit of set temperature for
HEAT mode.
o Press Timer Set button to confirm high limit selection.
o LCD returns to original display if remote control does not operate for 30 seconds or press Timer Cancel
o LCD returns to original display if remote control does not operate for 30 seconds or press Timer Cancel
button.
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