Troubleshooting
Si12-308
172
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
A
1
2
3
4
5
3
3
3
3
00
Outdoor unit in normal condition
(Conduct a diagnosis of the indoor unit.)
—
UA
Unspecified voltage (between indoor and outdoor units)
206
UH
Anti-icing function in other rooms
206
5
3
3
4
4
(
U0
)
Insufficient gas
203
5
4
3
4
3
(
E5
)
OL activation (compressor overload)
184
5
3
4
4
3
(
E6
)
Compressor lock
185
5
4
3
4
3
F3
Discharge pipe temperature control
191
5
3
3
3
4
L4
Radiation fin temperature rise
(Protection of driver overheating)
199
5
4
4
3
3
H8
CT or related abnormality
193
5
4
4
3
3
H6
Position sensor abnormality
192
H9
Outdoor air thermistor or related abnormality
195
J3
Discharge pipe thermistor or related abnormality
195
J6
Heat exchanger thermistor or related abnormality
195
J8
Liquid pipe thermistor or related abnormality
195
J9
Gas pipe thermistor or related abnormality
195
P4
Radiation fin thermistor or related abnormality
195
5
3
3
4
3
L5
Output over current detection
201
5
3
4
3
4
E8
Input over current detection
187
5
4
3
4
4
A5
Freeze-up protection control
182
5
4
4
4
4
E7
DC fan lock
186
5
4
3
3
3
EA
Four way valve abnormality
189
5
4
4
3
4
L3
Electrical box temperature rise
197
5
4
3
3
4
U2
Low-voltage detection
205
Summary of Contents for Super Multi NX B series
Page 7: ...Si12 308 vi Table of Contents ...
Page 29: ...List of Functions Si12 308 18 List of Functions ...
Page 71: ...Specifications Si12 308 60 Specifications ...
Page 175: ...Instruction Si12 308 164 System Configuration ...
Page 227: ...Check Si12 308 216 Service Diagnosis ...
Page 288: ...Si12 308 Wiring Diagrams Appendix 277 FTXD50BVMC FTXD60 71BVMC ...
Page 299: ...Si12 308 iv Index ...