40MBDAQ: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
16
Indoor Unit Diagnostic Guides
Table 6 — Indoor Unit Error Display
For other errors:
The display board may show a garbled code or a code not listed in the service manual. Ensure this code is not a temperature reading.
Troubleshooting:
Test the unit using the remote control. If the unit does not respond to the remote, the indoor PCB needs to be replaced. If the unit responds, the display
board needs to be replaced.
Table 7 — Error Display on Two Way Communication Wired Controller
OPERATION LAMP TIMER LAMP DISPLAY ERROR INFORMATION SOLUTION
1 time OFF E0 Indoor unit EEPROM parameter error Page 17
2 times OFF E1 Indoor / outdoor unit communication error Page 18
4 times OFF E3 The indoor fan speed is operating outside of the normal range Page 21
5 times OFF E4 Indoor room temperature sensor T1 is in open circuit or has short circuited Page 25
6 times OFF E5 Evaporator coil temperature sensor T2 is in open circuit or has short circuited Page 21
7 times OFF EC Refrigerant Leakage Detection Page 26
8 times OFF EE Water-level alarm malfunction Page 27
9 times OFF E8 Communication error between master and slave unit (for twins system) Page 29
10 times OFF E9 Another indoor unit malfunction (for twins system) --
11 times OFF Ed Outdoor unit malfunction Page 28
1 time ON F0 Current overload protection Page 30
2 times ON F1 Outdoor room temperature sensor T4 is in open circuit or has short circuited Page 25
3 times ON F2 Condenser coil temperature sensor T3 is in open circuit or has short circuited Page 25
4 times ON F3
Compressor discharge temperature sensor TP is in a open circuit or has short-
circuited
Page 25
5 times ON F4 Outdoor unit EEPROM parameter error Page 17
6 times ON F5 The outdoor fan speed is operating outside of the normal range Page 21
7 times ON F6
Evaporator coil outlet temperature sensor T2B is in open circuit or has short circuited
(for free-match indoor units)
Page 25
11 times ON FA Communication error between indoor two chips Page 17
1 time FLASH P0 IPM malfunction or IGBT over-strong current protection Page 32
2 times FLASH P1 Over voltage or over low voltage protection Page 33
3 times FLASH P2 Top temperature protection of compressor Page 34
5 times FLASH P4 Inverter compressor drive error Page 32
6 times FLASH P5/-- Indoor units mode conflict (match with multi outdoor unit) Page 43
7 times FLASH P6 High pressure protection or low pressure protection Page 35
8 times FLASH P7 IGBT temperature sensor TH is in open circuit or has short circuited Page 25
DISPLAY ERROR INFORMATION SOLUTION
F0 Communication error between wired controller and indoor unit Page 30
EHb3 Communication error between wire controller and indoor unit (for KSACN0701AAA series wired controller) Page
E1 Indoor / outdoor unit communication error Page 18
E2 Indoor room temperature sensor T1 is in open circuit or has short circuited --
E3 Evaporator coil temperature sensor T2 is in open circuit or has short circuited Page 21
E4 Indoor coil outlet temperature sensor T2B is in open circuit or has short circuited Page 25
E5
Outdoor coil temperature sensor malfunction T3 or Outdoor ambient temperature sensor malfunction T4 or Compressor
discharge temperature sensor TP is in open circuit or has short circuited
Page 21
E7 Indoor EEPROM malfunction Page
E8 The indoor fan speed is operating outside of the normal range Page 29
EA Current overload protection Page
E IPM malfunction or IGBT over-strong current protection Page
E Outdoor unit malfunction Page
EE Water-level alarm malfunction Page 27
EF Other malfunction --
To Next Page
Loading...
