Carrier 40VMU012 Series, Installation And Maintenance Instructions Manual

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16
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.
Table 8 — LED Display Indicators
LEGEND
ERROR CODE 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 Error
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 Error In Auto System-Check Mode
DEFRO S T/
FAN LIGHT
ALARM LIGHT
OPERATION
LIGHT
TIMER LIGHT
INFO BUTTON
a 40-1 8 7 8
Fig. 30 — LED Display Panel
EEPROM — Electronically Erasable Programmable Read-only
Memory
EEV — Electronic Expansion Valve
MDC — Multiport Distribution Controller