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15. Servicing
Mode
15.1 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 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 (J1)
Jumper B (D2)
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.
Summary of Contents for CS-E7NKEW
Page 21: ...21 Outdoor Unit CU 2E15LBE Outdoor Unit CU 2E18LBE ...
Page 22: ...22 Outdoor Unit CU 3E18LBE ...
Page 23: ...23 Outdoor Unit CU 4E23LBE ...
Page 24: ...24 ...
Page 25: ...25 Outdoor Unit CU 4E27CBPG ...
Page 26: ...26 ...
Page 28: ...28 4 Location of Controls and Components 4 1 Indoor Unit 4 2 Outdoor Unit 4 3 Remote Control ...
Page 30: ...30 5 1 2 CS E18NK CS E21NK CS XE18NK CS XE21NK ...
Page 32: ...32 5 2 3 CU E18NKE CU E21NKE ...
Page 33: ...33 6 Refrigeration Cycle Diagram 6 1 CU E7NKE CU E9NKE CU E12NKE CU E15NKE ...
Page 34: ...34 6 2 CU E7NKE 3 CU E9NKE 3 CU E12NKE 3 ...
Page 35: ...35 6 3 CU E18NKE ...
Page 36: ...36 6 4 CU E21NKE ...
Page 37: ...37 7 Block Diagram 7 1 CU E7NKE CU E9NKE ...
Page 38: ...38 7 2 CU E12NKE ...
Page 39: ...39 7 3 CU E15NKE ...
Page 40: ...40 7 4 CU E7NKE 3 CU E9NKE 3 CU E12NKE 3 ...
Page 41: ...41 7 5 CU E18NKE CU E21NKE ...
Page 42: ...42 8 Wiring Connection Diagram 8 1 Indoor Unit ...
Page 43: ...43 8 2 Outdoor Unit 8 2 1 CU E7NKE CU E9NKE ...
Page 44: ...44 8 2 2 CU E12NKE ...
Page 45: ...45 8 2 3 CU E15NKE ...
Page 46: ...46 8 2 4 CU E7NKE 3 CU E9NKE 3 CU E12NKE 3 ...
Page 47: ...47 8 2 5 CU E18NKE CU E21NKE ...
Page 48: ...48 9 Electronic Circuit Diagram 9 1 Indoor Unit ...
Page 49: ...49 9 2 Outdoor Unit 9 2 1 CU E7NKE CU E9NKE ...
Page 50: ...50 9 2 2 CU E12NKE ...
Page 51: ...51 9 2 3 CU E15NKE ...
Page 52: ...52 9 2 4 CU E7NKE 3 CU E9NKE 3 CU E12NKE 3 ...
Page 53: ...53 9 2 5 CU E18NKE CU E21NKE ...
Page 54: ...54 10 Printed Circuit Board 10 1 Indoor Unit 10 1 1 Main Printed Circuit Board ...
Page 56: ...56 10 1 5 Human Activity Sensor Printed Circuit Board ...
Page 57: ...57 10 2 Outdoor Unit 10 2 1 CU E7NKE CU E9NKE CU E7NKE 3 CU E9NKE 3 CU E12NKE 3 ...
Page 58: ...58 10 2 2 CU E12NKE CU E15NKE ...
Page 59: ...59 10 2 3 CU E18NKE CU E21NKE ...
Page 96: ...96 16 3 Error Codes Table ...
Page 97: ...97 ...
Page 127: ...127 17 1 1 3 To remove discharge grille ...
Page 128: ...128 17 1 1 4 To remove control board 17 1 1 5 To remove cross flow fan and indoor fan motor ...
Page 129: ...129 ...
Page 131: ...131 17 2 1 3 To remove power electronic controller ...
Page 133: ...133 ...