Carrier 40VMH024 - Troubleshooting

29
TROUBLESHOOTING
Figure 49 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. 49 —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 Indoor Ambient Temperature Sensor (T1)
E4 Check Evaporator 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
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