Troubleshooting - Carrier 40VMM Series Installation And Maintenance Instructions Manual

Figure 40 shows the LED display panel on the indoor unit. See Table 5 for a summary of display indicators. Table 6 lists problems,
possible causes, and possible solutions.
ERROR CODE
[NO ERROR]
dd
E1
E2
E4
E5
E6
E7
E9
UU
Eb
Ed
EE
FE
LEGEND
EEPROM — Electronically Erasable Programmable Read-only Memory
EEV — Electronic Expansion Valve
MDC — Multiport Distribution Controller

TROUBLESHOOTING

MANUAL OPERATION TIMER DEF./FAN ALARM
Fig. 40 — LED Display Panel
Table 5 — LED Display Indicators
LED DISPLAY
Operation Light ON
None
Operation Light Flashing
Timer Light ON
Timer Light OFF
Operation and Defrost / Fan Light ON
Operation and Defrost / Fan Light OFF
Operation Light ON
None
None
None
None
None
None
None
None
None
None
None
None
None
Starting
Shutdown
Standby
Timing ON
Timing OFF
System Defrost ON
System Defrost OFF
Only fan
Heating / Cooling Mode Conflict
Communication Error Between Indoor and Outdoor Unit
Check Indoor Ambient Temperature Sensor (T1)
Check Evaporator Temperature Sensor (T2B)
Check Evaporator Outlet Temperature Sensor (T2A)
Check DC Fan Motor
EEPROM Error (Data Storage)
Communication Error Between Indoor Unit and Controller
MDC Error In Auto System-Check Mode
EEV Error
Outdoor Unit Error
Condensate Error
No Address When Power ON For First Time
23
a40-1873
MODE/STATUS