MXS Service Manual

SiUS121736EA Code Indication on Remote Controller
Service Diagnosis 150
4.3 Outdoor Unit
i: ON, h: OFF, j: Blinks
Notes: 1. The error codes in the parenthesis ( ) are displayed only when the system is shut down.
2. When a sensor error occurs, check the remote controller display to determine which sensor is
malfunctioning.
If the remote controller does not indicate the error code, conduct the following procedure.
∗ Turn the power off and then on again. If the same LED indication appears again immediately
after the power is turned on, the fault is in the thermistor.
∗ If the above condition does not result, the fault is in the CT.
3. The indoor unit error code may take the precedence in the remote controller display.
4. Turn the power off and then on again. If the same LED indication appears again, outdoor unit
PCB is faulty. Replace the outdoor unit PCB.
Outdoor Unit LED Indication
Error
Codes
Description
Reference
Page
Green Red
A12345
jhhhhh
00 Normal condition —
UA Unspecified voltage (between indoor unit and outdoor unit) 184
UH Anti-icing control in other rooms 184
jhhiih
(U0) Refrigerant shortage 179
jihhih
U2 Low-voltage detection or over-voltage detection 181
jhihhh
U3 Wiring error check unexecuted 183
jihiih
A5 Anti-icing control for indoor unit 185
jiiihh
E1 Outdoor unit PCB abnormality 187
jihihh
(E5) OL activation (compressor overload) 188
jhiihh
(E6) Compressor lock 190
jiiiih
E7 DC fan lock 191
jhihih
E8 Input overcurrent detection 192
jihhhh
EA Four way valve abnormality 193
jihihh
F3 Discharge pipe temperature control 195
jihiih
F6 High pressure control in cooling 196
jiihhh
H0 Compressor sensor system abnormality 197
H6 Position sensor abnormality 199
H8 CT or related abnormality 201
H9 Outdoor temperature thermistor or related abnormality 203
J3 Discharge pipe thermistor or related abnormality 203
J6 Outdoor heat exchanger thermistor or related abnormality 203
J8 Liquid pipe thermistor or related abnormality 203
J9 Gas pipe thermistor or related abnormality 203
P4 Radiation fin thermistor or related abnormality 203
jiihih
L3 Electrical box temperature rise 205
jhhhih
L4 Radiation fin temperature rise 206
jhhihh
L5 Output overcurrent detection 207
i
——————
See the note 4.
—
h
——————
Check the power supply.
—