Troubleshooting - Carrier 40VMU Series Installation And Maintenance Instructions Manual

TROUBLESHOOTING

Figure 30 shows the LED display panel. See Table 8 for a summary of display indicators. Table 9 lists problems, possible causes, and
possible solutions.
TYPE
[NO ERROR]
ERROR
LEGEND
EEPROM — Electronically Erasable Programmable Read-only Memory
EEV — Electronic Expansion Valve
MDC — Multiport Distribution Controller
DEFROST/
ALARM LIGHT
FAN LIGHT
TIMER LIGHT INFO BUTTON
OPERATION
LIGHT
Fig. 30 —40VMU Display Panel
Table 8 — Display Indicators
LED DISPLAY
Setting Temperature
"--"
"--"
"--"
"--"
Setting Temperature
Setting Temperature
dd
E1
E2
E4
E5
E6
E7
E9
Eb
Ed
EE
FE
UU
15
a40-1878
MODE/STATUS
Starting
Shutdown
Standby
Timing ON
Timing OFF
System Defrost ON
System Defrost OFF
Heating / Cooling Mode Conflict
Communication Error Between Indoor and Outdoor Unit
Check Indoor Ambient Temperature Sensor (T1/T0)
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
EEV Error
Outdoor Unit Error
Condensate Error
No Address When Power ON For First Time
MDC In Auto System-Check Mode