User Guide

UNIT MAINTENANCE & SERVICE GUIDE UNIT MAINTENANCE & SERVICE GUIDE
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YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
TROUBLESHOOTING
When there's malfunction or protection, the display screen of indoor unit or LED will display corresponding code
and LED on main board of outdoor unit will also have warnings. Please refer to the function parts as before for
details. When protection or malfunction has been eliminated, the display will resume normal status.
Analysis or disposal for some display malfunction
Notice:
1) For cassette type, floor standing type indoor unit, wire controller is optional. If the unit hasn't been equipped
with the wire controller, there's no display malfunction for wire controller.
2) Cassette type unit only has 3 indicators, no dual 8 display.
3) Only the cassette type is with the error protection of water overflow. Floor ceiling type and duct type indoor
fans are not built with the error protection.
TROUBLE SHOOTING
Clauses and
troubleshooting
The jumper cap is missed
or bad on main board of
indoor unit.
Please check or replace
the correct jumper or the
main board of indoor unit.
Wire
controller
Dual 8
nixietube
Wire
controller
display
method
for duct type
unit
Dual 8 for
floor
ceiling unit
Green light
(cooling LED)
Yellow light
(heating LED)
Red light
(running LED)
Malfunction name
Indicator
No
There's connecting
problem at WATER-D on
main board or the water
overflow switch is bad
device, please check or
replace it.
The temperature sensor
at ROOM on indoor main
board has malfunction,
please check or replace
it.
The temperature sensor
at TUBE or TUBE-I or
TUBE-O on indoor main
board has malfunction,
please check or replace
it.
Replace the wire
controller.
E3C5
H8H8
Blink 8 times
F0F1
Blink once
F1F2Blink twice
F5
Display the malfunction of indoor ambient temperature
sensor when using this temperature sensor.
(Green light: blink once)
Blink 15 times
Malfunction of jumper cap
Water overflow protection
Indoor ambient
temperature sensor is
open circuit or short
circuit
2
1
3
4
5
Indoor evaporator
temperature sensor is
open circuit or short
circuit
Malfunction of ambient
temperature sensor on
wire controller
TROUBLE SHOOTING
ERROR CODE LIST
Malfunction name
Red light
(running
LED)
Yellow light
(heating
LED)
Green light
(cooling
LED)
Floor
ceiling
dual 8
Display of
wire
controller
Display of wire
controller for
duct type unit
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
High pressure protection of system
Antifreezing
Low pressure protection of system
Discharge protection
Low voltage overcurrent protection
Communication malfunction
Mode shock
Malfunction of jumper cap
Defrosting/heating oil return
Overload protection of comrpessor
System is abnormal
Module protection
PFC protection
Out-of-step malfunction of compressor
including erase malfunction
Water overflow protection
Indoor ambient temperature sensor is
open circuit or short circuit
Indoor evaporator temperature sensor is
open circuit or short circuit
Outdoor ambient temperature sensor is
open circuit or short circuit
Outdoor condenser temperature sensor
is open circuit or short circuit
Discharge temperature sensor is open
circuit or short circuit
The reserved outdoor unit displays E2
Malfunction of ambient temperature
sensor on wire controller
Blink once
Blink twice
Blink 3 times
Blink 4 times
Blink 5 times
Blink 6 times
Blink 7 times
Blink 15 times
Blink once
Blink 3 times
Blink 4 times
Blink 5 times
Blink 6 times
Blink 7 times
Blink 8 times
Blink once
Blink twice
Blink 3 times
Blink 4 times
Blink 5 times
Blink 11times
Blink 5 times
Display the malfunction of indoor ambient temperature sensor
when using this temperature sensor (Green light: blink once)
Yes
Yes
Yes
Yes
Yes
No
No
No
Yes
Yes
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
E1 E1
E2 E2
E3 E3
E4 E4
E5
E6
E7
C5
H1
H3
H4
H5
HC
H7
H8
F1
F2
F3
F4
F5
HA
E1
E6
E2
E3
Defrost
E5
F4
E3
E5
H8
H8
F0
F1
F3
F2
F4
No
F5