6TQWDNGUJQQVKPI
Display Method of Indoor Unit
Indicator lamp
(During blinking, ON for 0.5S
and OFF for 0.5 S)
No.
Malfunction Name
Error
Code
Operation
Lamp
COOL
Lamp
HEAT
Lamp
A/C Status
Possible Causes
1
2
E1
E2
OFF 3S and
blinks once
(inverter
unit); the
running
indicator
blinks
(non-inverter
floor
standing
unit); As for
other types
of units,
please refer
to the
detailed
function
requirement.
During cooling and
drying operation, except
indoor fan operates, all
loads stop operation.
During heating
operation, if it is inverter
unit, the complete unit
stops; if it is floor
standing unit, the
complete unit stops and
operation of remote
controller or controller is
unavailable.
1. The main board and the display
panel are not connected well.
2. The OVC terminal on main board
is not connected well with the high
pressure switch on the complete unit.
3. The wiring of high pressure switch
is loosened.
4. Refrigerant is superabundant;
5. Poor heat exchange (including
blocked heat exchanger and bad
radiating environment );
6. Ambient temperature is too high; (if
it is 3-phase unit, the high pressure
protection may be caused by
overcurrent protection due to this
reason)
7. The supply voltage is abnormal (if
it is 3-phase unit, the high pressure
protection may be caused by
overcurrent protection due to this
reason)
8. The air intake and air discharge at
indoor / outdoor heat exchanger are
not smooth. The air cycle is short
circuited.
9. Filter and heat exchange fins of
indoor/outdoor units are blocked.
10. The system pipeline is blocked.
11. The gas valve and liquid valve for
outdoor unit are not completely
opened.
12. The OVC input is at high level.
Freeze protection
OFF 3S and
blinks twice
During cooling and
drying operation,
compressor and
1. Poor air-return in indoor unit;
2. Abnormal fan speed;
3. Dirty evaporator;
(inverter
unit);
running
indicator
blinks
(non-inverter
floor
standing
unit); As for
other types
of units,
please refer
to the
detailed
function
requirement.
outdoor fan stop while
indoor fan operates.
4. System is normal, but the indoor
tube temperature sensor is abnormal,
or the tube temperature sensor is not
connected well.
High pressure
protection