Carrier 40WAW007-024 Installation And Maintenance Instructions Manual page 11

ERROR CODE
[NO ERROR]
E0
E1
E2
E3
E4
E7
Ed
EE
FE
*Flashing Slow = Flashing once per second.
†Flashing Fast = Flashing twice per second.
ERROR DISPLAY
Defrost Light Flashing Fast (Heating/
E0 Cooling Mode Conflict Error)
(40WAW024 only)
Timer Light Flashing Fast
E1
(Communication Error)
E2, E3, Operation Light Flashing Fast
E4 (Sensor Error)
Defrost Light Flashing Slow
E7 (EEPROM Error)
(40WAW024 only)
Alarm Light Flashing Slow (Outdoor
Ed Unit Error)
(40WAW024 only)
Alarm Light Flashing Fast (Water
EE Level Error)
(40WAW024 only)
Operation and Timer Lights Flashing
FE Fast Together
(Address Error)
Table 3 — LED Display Indicators
LED DISPLAY
Operation Light ON
Operation Light OFF
Operation Light Flashing Slow*
Timer Light ON
Timer Light OFF
Defrost / Fan Light ON (40WAW024 only)
Defrost / Fan Light OFF (40WAW024 only)
Defrost / Fan Light Flashing Fast†
(40WAW024 only)
Timer Light Flashing Fast
Operation Light Flashing Fast
Defrost / Fan Light Flashing Slow
(40WAW024 only)
Alarm Light Flashing Slow (40WAW024 only)
Alarm Light Flashing Fast (40WAW024 only)
Operation and Timer Lights Flashing Fast
Table 4 — Troubleshooting
POSSIBLE CAUSES
System is in cooling or fan only mode and
heating signal is received from a unit on the
system.
System is in heating mode and cooling sig-
nal is received from a unit on the system.
Signal wires are short-circuited or
disconnected.
Signal wire order is incorrect.
Signal wires crossing over high voltage
power wires.
Signal wire close to electromagnetic source. Distance signal wires from electromagnetic
Signal wire length exceeds 360 ft.
PC board fault.
Loose connection at port on PC board.
Sensor is short-circuited.
PC board fault.
Chip or PC board fault.
Outdoor unit fault.
Loose connection or disconnected at port
on PC board.
Water level float is stuck.
Trap slope is too steep.
Drain pipe is too long.
Drain pump faulty.
Indoor unit without address.
Starting
Shutdown
Standby
Timing ON
Timing OFF
System Defrost ON
System Defrost OFF
Heating / Cooling Mode Conflict Error
Communication Error Between Indoor and Outdoor Unit
Check Indoor Ambient Temperature Sensor (T1)
Check Evaporator Temperature Sensor (T2)
Check Evaporator Outlet Temperature Sensor (T2B)
EEPROM Error (Data Storage)
Outdoor Unit Error
Water Level Error
Indoor Unit Turned ON But Does Not Have An Address
All units should be in cooling mode for system to
stay in cooling mode.
All units should be in heating mode.
Check or reconnect signal wire.
Correct signal wire order.
Separate and distance the signal wire from high
voltage power wires.
source.
Reduce the signal wire length.
Replace PC board.
Tighten the connection at port on PC board.
Using multi-meter, measure resistance of the sen-
sor. If the resistance is  100 ohms, change the
sensor.
Replace PC board.
Replace PC board.
Refer to outdoor unit troubleshooting guide.
Tighten the connection or reconnect at port on PC
board.
Inspect the float.
Adjust the trap slope.
Adjust the length of drain pipe.
Replace the drain pump.
Run automatic addressing option at the outdoor
unit.
Use remote wireless or wired controller to re-
address indoor unit.
11
MODE/STATUS
POSSIBLE SOLUTIONS