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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.
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 Normal cooling operation.
Within 5 minutes after Normal cooling operation start, the Auto OFF/ON button is pressed for more than
5 seconds. A 3 “beep” sounds will be 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.
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.
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.
Auto OFF/ON
Button pressed
Auto Operation
5 sec 5 sec 5 sec
Beep x 2 Beep x 3Beep
Test Run Operation
(Forced cooling operation)
Stop Normal Cooling Operation Stop
Test Run Operation
(Forced heating operation)
Stop
Auto OFF/ON
Button pressed
Auto OFF/ON
Button pressed
Auto OFF/ON
Button pressed
Auto Operation
Test Run Operation
(Forced Cooling Operation)
Test Run Operation
(Forced Heating Operation)
Remote Control Number
Switch Mode
Remote Control Receiving
Sound OFF/ON
Auto OFF/ON button
pressed
Beep x 4Beep x 3Beep Beep x 2
5 sec
8 sec 11 sec 16 sec
Main unit always continue Test Run (forced cooling) operation.
Press “AC RESET”, then any
key at remote control
Press “AC RESET”, then any
key at remote control
Press “AC RESET”
at remote control
JB
JA
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