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18 Specifications subject to change without notice. 38MARB-01SI
OUTDOOR UNIT DIAGNOSTIC GUIDES
For ease of service, the systems are equipped with diagnostic code display LEDs on both the indoor and outdoor units. The outdoor diagnostic is
displayed on the outdoor unit microprocessor board.
There may be a few error codes displayed in the indoor unit that might relate to the outdoor unit's problems. If possible, always check the
diagnostic codes displayed on the indoor unit first. The diagnostic codes displayed on the outdoor units are listed on Table 10 on page 17.
Table 11 — Indoor Unit Diagnostic Codes
O (on − light) X (off − light) ☆(flash)
For additional diagnostic information, refer to the service manual.
Table 12 — Indoor Unit Functional Codes
OPERATION LAMP (TIMES) TIMER LAMP DISPLAY ERROR INFORMATION
☆1 OFF EH 00/EH 0A Indoor unit EEPROM parameter error
☆2 OFF EL 01 Indoor/outdoor unit communication error
☆3 OFF EH 02 Zero-crossing signal detection error
☆4 OFF EH 03 Indoor fan operating outside of the normal range
☆5 OFF EC 51 Outdoor unit EEPROM parameter error
☆5 OFF EC 52 T3 is in open circuit or has short circuited
☆5 OFF EC 53 T4 is in open circuit or has short circuited
☆5 OFF EC 54 TP is in open circuit or has short circuited
☆5 OFF EC 56 T2B is in open circuit or has short circuited
☆6 OFF EH 60 T1 is in open circuit or has short circuited
☆6 OFF EH 61 T2 is in open circuit or has short circuited
☆12 OFF EC 07 Outdoor fan operating outside of the normal range
☆9 OFF EH 0b Indoor PCB/Display board communication error
☆8 OFF EL 0C Refrigerant leakage detection
☆7 FLASH PC 00 IPM malfunction or IGBT OSCP
☆2 FLASH PC 01 Over voltage or over low voltage protection
☆3 FLASH PC 02 Compressor or IPM high temp/pressure protection
☆5 FLASH PC 04 Inverter compressor drive error
☆1 FLASH PC 08 Current overload protection
☆6 FLASH PC 40 Comm. error between outdoor chip and compressor chip
☆7 FLASH PC 03 Low pressure protection
☆1 ON -- Indoor units mode conflict
☆9 OFF EH b1 Indoor board and Multi-function communication error
☆11 OFF FH 0d Ionizer malfunction
DISPLAY DESCRIPTION
dF Defrost
SC Self clean
CL Filter cleaning reminder
CL Active Clean (*model dependent)
nF Filter replacement reminder
FP Heating in room temperature under 8°C
FC Forced cooling
AP AP mode of WIFI connection
CP Remote switched off
LL Remote or Wire controller Lock
On Time On
Off Time Off
E-C-O ECO mode
SD Power abnormal detection
d1 Receive DR1 signal
d2 Receive DR2 signal
d3 Receive DR3 signal
dE DR input error signal
FH 0P AP mode is activated / no WIFI kit installed
FH 0d See outdoor unit for Error Code information
EH/EC/EL/PC See outdoor unit for Error Code information
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