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7 Troubleshooting
If the Followings Unit Malfunction Occurred, Please Follow the Below Simple Checking Step to Fix :
Symptom Analyses Solution
Compressor stop and fan
work normally
Indoor temperature is higher (heating) or lower (cooling) than
setting temperature
Re – set up the temperature
When heating and defrost mode, indoor unit is just running Waiting for 10minutes
Units do not work
Power is not on Check and connect the power
Set up the re-start function Wait or cancel timer on
Fuse broken in main power supply
Replace the fuse
Cooling or heating not
enough or too much
Air filter too dirty
Clean or replace the filter
Return air barrier Remove the barrier
Remote controller unreadable
Low battery Replace the battery
Wrong installation of battery Install properly
Condensing water in front
panel
Humidity too high Dehumidify
Setting temperature too low Set up the higher indoor temperature
• If user can not fix the problem, please contact the local service agent for assistance, meanwhile record
the malfunction code by remote controller and indication light of units self-checking function;
Fault Codes for MDSA/B Series
Item Code Description Item Code Description Item Code Description
1 E0 System malfunction 23 F8 4wv malfunction 45 16 Sensor broken(slave TH6 inlet coil 3#)
2 E1 Sensor broken(TH1 discharge temp) 24 F9 Refrigerant leakage 46 17
Sensor broken(slave
TH7 mid coil 3#)
3 E2 Sensor broken(TH2 inlet coil 1#) 25 FA
Controller storage malfunction
47 18
Sensor broken(slave
TH8 ambient temp.)
4 E3 Sensor broken(TH3 mid coil 1#) 26 FB
Water pump(indoor drain
pump)
48 19
Sensor broken(slave
TH9 outlet coil)
5 E4 Sensor broken(TH4 inlet coil 2#) 27 FC
Indoor and outdoor
communication malfunction
49 1A
Sensor broken(slave
TH10 subcool outlet)
6 E5 Sensor broken(TH5 mid coil 2#) 28 FE
Master and slave
communication malfunction
50 1B
Sensor broken(slave TH11 subcool
suction)
7 E6 Sensor broken(TH6 inlet coil 3#) 29 H0 Digital comp overload 51 1C
Sensor broken(slave
TH12 suction)
8 E7 Sensor broken(TH7 mid coil 3#) 30 H1 Fixed comp1 overload 52 1F Emergency run
9 E8 Sensor broken(TH8 ambient temp..) 31 H2 Fixed comp2 overload 53 20 Outdoor storage malfunction
10 E9 Sensor broken(TH9 outlet coil) 32 H3 Fixed comp3 overload 54 27 Ambient temp.. exceed the limit
11 EA Sensor broken(TH10 subcool outlet) 33 H4 High pressure too high 55 28 4wv malfunction
12 EB
Sensor broken(
TH11
subcool suction)
34 H5 Sensor broken, high pressure 56 29 Refrigerant leakage
13 EC Sensor broken(suction) 35 H6 Discharge temp. too high 57 30 Digital comp overload
14 EF Emergency run 36 L0 Super heat too low 58 31 Fixed comp1 overload
15 F0 Outdoor storage malfunction 37 L1 Low pressure too low 59 32 Fixed comp2 overload
16 F1 Sensor broken(indoor inlet coil) 38 L2 Sensor broken, low pressure 60 33 Fixed comp3 overload
17 F2 Sensor broken(indoor mid coil) 39 10 System malfunction 61 34 High pressure too high
18 F3 Sensor broken(indoor outlet coil) 40 11
Sensor broken(slave
TH1 discharge temp.)
62 35 Sensor broken, high pressure
19 F4 Sensor broken(indoor return air ) 41 12
Sensor broken(slave
TH2 inlet coil 1#)
63 36 Discharge temp. too high
20 F5 Sensor broken(indoor supply air) 42 13
Sensor broken(slave
TH3 mid coil 1#)
64 40
Super heat too low
21 F6
Indoor and controller
communication malfunction
43 14
Sensor broken(slave
TH4 inlet coil 2#)
65 41 Low pressure too low
22 F7 Ambient temp. exceed the limit 44 15
Sensor broken(slave
TH5 mid coil 2#)
66 42 Sensor broken, low pressure
Indication Light Twinkle Related to Malfunction Code:
Type Heat Fan Dry Cool Type Heat Fan Dry Cool Type Heat Fan Dry Cool
Sensor, outdoor
F F F F Pump, indoor F F On F Pressure high/low F F Off Off
Sensor, indoor
F F F On
Over load,
compressor
F F On On Communication F off F F
System failure
F F F Off Pressure sensor, outdoor F F On Off Others F off F On
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