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TROUBLESHOOTING
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
EEPRO
— Electronically Erasable Programmable Read-only Mem-
M
ory
EEV
— Electronic Expansion Valve
MDC
— Multiport Distribution Controller
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
CONFORMS TO UL STD 1995
CERTIFIED TO CSA STD.
C22. 2 No. 236
ELECTRIC CHARACTERISTICS ARE
ONLY FOR INDOOR UNIT.
MEDIUM STATIC DUCT UNIT
MODEL
POWER SUPPLY
MINIMUM CIRCUIT AMPACITY
MAX FUSE OR HACR BREAKER
FAN MOTOR
REFRIGERANT
DESIGN
PRESSURE
SERIAL NO.
Carrier Corporation
Fig. 41 — Unit Serial Plate (Example)
24
a40-1873
MODE/STATUS
3124627
40VMM007A--3
208/230V-1Ph-60Hz
1.25 A
15 A
FLA
1 A
OUTPUT
100W (1/6HP)
R410A
HIGH
580 PSIG
LOW
320 PSIG
1716V00001
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