Carrier 40VMU Series - TROUBLESHOOTING; Troubleshooting Display Indicators and Error Codes

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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.
Fig. 30 —40VMU Display Panel
Table 8 — Display Indicators
TYPE LED DISPLAY MODE/STATUS
[NO ERROR]
Setting Temperature Starting
“--” Shutdown
“--” Standby
“--” Timing ON
“--” Timing OFF
Setting Temperature System Defrost ON
Setting Temperature System Defrost OFF
ERROR
dd
Heating / Cooling Mode Conflict
E1 Communication Error Between Indoor and Outdoor Unit
E2
Check Indoor Ambient Temperature Sensor (T1/T0)
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 In Auto System-Check Mode
LEGEND
EEPROM — Electronically Erasable Programmable Read-only Memory
EEV — Electronic Expansion Valve
MDC — Multiport Distribution Controller
LIGHT
OPERATION
DEFROST/
FAN LIGHT
ALARM LIGHT
TIMER LIGHT
INFO BUTTON
a40-1878