11
Table 3 — LED Display Indicators
*Flashing Slow = Flashing once per second.
†Flashing Fast = Flashing twice per second.
Table 4 — Troubleshooting
ERROR CODE
LED DISPLAY
MODE/STATUS
[NO ERROR]
Operation Light ON
Starting
Operation Light OFF
Shutdown
Operation Light Flashing Slow*
Standby
Timer Light ON
Timing ON
Timer Light OFF
Timing OFF
Defrost / Fan Light ON
System Defrost ON
Defrost / Fan Light OFF
System Defrost OFF
E0
Defrost / Fan Light Flashing Fast†
Heating / Cooling Mode Conflict Error
E1
Timer Light Flashing Fast
Communication Error Between Indoor and Outdoor Unit
E2
Operation Light Flashing Fast
Check Indoor Ambient Temperature Sensor (T1)
E3
Check Evaporator Temperature Sensor (T2)
E4
Check Evaporator Outlet Temperature Sensor (T2B)
E7
Defrost / Fan Light Flashing Slow
EEPROM Error (Data Storage)
E6
Timer Light Flashing Slow
Fan Motor Error
Ed
Alarm Light Flashing Slow
Outdoor Unit Error
EE
Alarm Light Flashing Fast
Water Level Error
FE
Operation and Timer Lights Flashing Fast
Indoor Unit Turned ON But Does Not Have An Address
F0
Wired Remote Controller Only (40WA900023)
Communication Error Between Indoor Unit and Wired
Remote Controller
ERROR
DISPLAY
POSSIBLE CAUSES
POSSIBLE SOLUTIONS
E0
Defrost Light Flashing Fast (Heating/
Cooling Mode Conflict Error)
System is in cooling or fan only mode and
heating signal is received from a unit on the
system.
All units should be in cooling mode for system to
stay in cooling mode.
System is in heating mode and cooling sig-
nal is received from a unit on the system.
All units should be in heating mode.
E1
Timer Light Flashing Fast
(Communication Error)
Signal wires are short-circuited or
disconnected.
Check or reconnect signal wire.
Signal wire order is incorrect.
Correct signal wire order.
Signal wires crossing over high voltage
power wires.
Separate and distance the signal wire from high
voltage power wires.
Signal wire close to electromagnetic source.
Distance signal wires from electromagnetic
source.
Signal wire length exceeds 360 ft.
Reduce the signal wire length.
PC board fault.
Replace PC board.
E2, E3,
E4
Operation Light Flashing Fast
(Sensor Error)
Loose connection at port on PC board.
Tighten the connection at port on PC board.
Sensor is short-circuited.
Using multi-meter, measure resistance of the sen-
sor. If the resistance is
100 ohms, change the
sensor.
PC board fault.
Replace PC board.
E6
Timer Light Flashing Slow
DC motor fault.
Replace DC motor.
PC board fault.
Replace PC board.
E7
Defrost Light Flashing Slow
(EEPROM Error)
Chip or PC board fault.
Replace PC board.
Ed
Alarm Light Flashing Slow (Outdoor
Unit Error)
Outdoor unit fault.
Refer to outdoor unit troubleshooting guide.
EE
Alarm Light Flashing Fast (Water
Level Error)
Loose connection or disconnected at port
on PC board.
Tighten the connection or reconnect at port on PC
board.
Water level float is stuck.
Inspect the float.
Trap slope is too steep.
Adjust the trap slope.
Drain pipe is too long.
Adjust the length of drain pipe.
Drain pump faulty.
Replace the drain pump.
FE
Operation and Timer Lights Flashing
Fast Together
(Address Error)
Indoor unit without address.
Run automatic addressing option at the outdoor
unit.
Use remote wireless or wired controller to re-
address indoor unit.
F0
Wired Remote Controller Screen
Incorrect signal wiring between indoor unit
and wired remote controller.
Correct signal wiring between indoor unit and
wired remote controller as per wiring diagram pro-
vided in installation manual.
