Troubleshooting - Carrier 40VMZ Installation And Maintenance Instructions Manual

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