19
TROUBLESHOOTING
Figure 35 shows the LED display panel on the indoor unit.
Table 5 provides a summary of display indicators. Table 6 lists problems, possible causes, and possible solutions.
Fig. 35 —LED Display Panel
Table 5 —LED Display Indicators
LEGEND
EEPROM - Electronically Erasable Programmable Read-only Memory
EEV - Electronic Expansion Valve
MDC - Multi-port Distribution Controller
ERROR CODE
LED DISPLAY
MODE/STATUS
[NO ERROR]
Operation Light ON
Starting
None
Shutdown
Operating Light Flashing
Standby
Timer Light ON
Timing ON
Timer Light OFF
Timing OFF
Operation and Defrost/Fan Light ON
System Defrost ON
Operation and Defrost/Fan Light OFF
System Defrost OFF
Operation Light ON
Only FAN
dd
None
Heating/Cooling Mode Conflict
E1
Communication Error Between Indoor and Outdoor Unit
E2
Check Return Air Temperature Sensor (T1)
E3
Check Supply Air Temperature Sensor (TA)
E4
Check Evaporator Inlet Temperature Sensor (T2B)
E5
Check Evaporator Outlet Temperature Sensor (T2A)
E6
Check DC Fan Motor
E7
EEPROM Error (Data Storage)
E9
Communication Error Between Indoor Unit and Controller
Eb
EEV Error
Ec
Indoor Fan Error in Auto System Check Mode
Ed
Outdoor Unit Error
EE
Condensate Error
FE
No Address When Power ON For First Time
UU
MDC Error In Auto System-Check Mode
MANUAL OPERATION TIMER DEF./FAN ALARM
