16
8.3 Flashing LED of Indoor/Outdoor unit and primary judgement
Display Method of Indoor Unit
Indicator Display (during
blinking, ON 0.5s and OFF
0.5s)
Display Method of Outdoor Unit
Indicator has 3 kinds of display
status and they will be displayed
circularly every 5s.
No Malfunction
LED
88
Operation
Indicator
COOL
Indicator
Heating
Indicator
Yellow
Indicator
Red
Indicator
Green
Indicator
A/C status
Possible causes
1
High pressure
protection of
system
E1
Blinks
once
- During cooling and
drying operation,
except indoor fan
operates, all loads stop
operation.
- During heating
operation, the
complete unit stops.
1. Refrigerant was
superabundant.
2. Poor heat exchange
(including filth blockage
of heat exchanger and
bad radiating
environment);
3. Ambient temperature
is too high.
2
Antifreezing
protection
E2
Blinks
twice
Blinks 3
times
During cooling and
drying operation,
compressor and
outdoor fan stop
while indoor fan
operates.
1. Poor air-return in
indoor unit.
2. Fan speed is
abnormal.
3. Evaporator is dirty.
3
Refrigerant
leakage
protection
F0
Blinks 9
times
The Dual-8 Code
Display will show F0
and the complete unit
stops.
1. Refrigerant
leakage;
2. Indoor evaporator
temperature sensor
works abnormally;
3. The unit has been
plugged up somewhere.
4
High
discharge
Temperature
protection of
compressor
E4
Blinks 4
times
Blinks 7
times
- During cooling and
drying operation,
compressor and
outdoor fan stop while
indoor fan operates.
- During heating
operation, all loads
stop.
Please refer to the
malfunction analysis
(discharge protection,
overload).
5
Overcurrent
protection
E5
Blinks 5
times
Blinks 5
times
- During cooling and
drying operation,
compressor and
outdoor fan stop while
indoor fan operates.
- During heating
operation, all loads
stop.
1. Supply voltage is
unstable.
2. Supply voltage is
too low and load is too
high.
3. Current is too high.
6
Communication
Malfunction
E6
Blinks 6
times
Always
ON
- During cooling
operation,
compressor stops
while indoor fan
motor operates.
- During heating
operation, the
complete unit stops.
Refer to the
corresponding
malfunction analysis.
7
High temp.
resistant
protection
E8
Blinks 8
times
Blinks 6
times
- During cooling
operation:
compressor will stop
while indoor fan will
operate.
- During heating
operation, the
complete unit stops.
Refer to the
malfunction analysis
(overload, high
temperature
resistant).
8
EEPROM
malfunction
EE
Blinks 15
times
Blinks 11
times
- During cooling and
drying operation,
compressor will stop
while indoor fan will
operate.
- During heating
operation, the
complete unit will
stop
Replace outdoor
control panel AP1.
9
Limit/decrease
frequency due
to high temp of
module
EU
Blinks 6
times
Blinks 6
times
All loads operate
normally, while
operation frequency for
compressor is
decreased
Discharging after the
complete unit is
de-energized for 20min,
check whether the
thermal grease on IPM
Module of outdoor
control panel AP1 is
sufficient and whether
the radiator is inserted
tightly. If it’s no use,
please replace control
panel AP1.
Summary of Contents for BDS28A
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