Troubleshooting SiE12-411
168 Service Diagnosis
5.2 Outdoor Units
4: ON, 1: OFF, 5: Blinks
Green : Flashes when in normal condition
Red : OFF in normal condition
- : Not used for troubleshooting
∗ : Varies depending on the cases.
Note: 1. The indications in the parenthesis ( ) in the remote controller display column are displayed
only when system-down occurs.
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 type, conduct the following operation.
*Turn the power switch off and back 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 indication may take the precedence in the remote controller display.
Outdoor Unit LED Indication Indication on
the remote
controller
Description of The Fault
Details of
Fault (Refer
to the
indicated
page.)
Green Red
A1234
5333300
Outdoor unit in normal condition
(Conduct a diagnosis of the indoor unit.)
—
UA
Unspecified voltage (between indoor and outdoor units)
203
UH
Anti-icing function in other rooms
203
53344 (U0)
Insufficient gas
200
54343 (E5)
OL activation (compressor overload)
181
53443 (E6)
Compressor lock
182
54343F3
Discharge pipe temperature control
188
53334L4
Radiation fin temperature rise
(Protection of driver overheating)
196
54433H8
CT or related abnormality
190
54433H6
Position sensor abnormality
189
H9
Outdoor air thermistor or related abnormality
192
J3
Discharge pipe thermistor or related abnormality
192
J6
Heat exchanger thermistor or related abnormality
192
J8
Liquid pipe thermistor or related abnormality
192
J9
Gas pipe thermistor or related abnormality
192
P4
Radiation fin thermistor or related abnormality
192
53343L5
Output over current detection
198
53434E8
Input over current detection
184
54344A5
Freeze-up protection control
179
54444E7
DC fan lock
183
54333EA
Four way valve abnormality
186
54434L3
Electrical box temperature rise
194
54334U2
Low-voltage detection
202
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