![background image](http://html.mh-extra.com/html/daikin/2amx40g2v1b/2amx40g2v1b_service-manual_501057183.webp)
SiBE12-933_A
Troubleshooting
Service Diagnosis
173
4. Troubleshooting
4.1
Error Codes and Description
★
: Displayed only when system-down occurs.
Code Indication Description
Reference
Page
System
00
Normal
—
U0
★
Refrigerant shortage
205
U2
Over-voltage detection / low-voltage detection
207
U4
Outdoor unit PCB abnormality or signal transmission circuit abnormality
209
UA
Unspecified voltage (between indoor and outdoor units)
208
UH
Anti-icing function in other rooms
208
Indoor
Unit
A1
Indoor unit PCB abnormality
174
A5
Freeze-up protection control or high pressure control
175
A6
Fan motor or related
abnormality
AC motor (Duct, Floor / Ceiling)
177
DC motor (Wall, Floor)
178
C4
Heat exchanger temperature thermistor abnormality
181
C7
Front Panel Open / Close Fault
182
C9
Room temperature thermistor abnormality
181
Outdoor
Unit
A5
Freeze-up protection control
183
E5
★
OL activation (compressor overload)
185
E6
★
Compressor lock
186
E7
DC fan lock
187
E8
Input overcurrent detection
188
F3
Discharge pipe temperature control
190
F6
High pressure control in cooling
191
H0
Compressor sensor system abnormality
193
H6
Position sensor abnormality
194
H8
DC voltage / DC current sensor abnormality
196
H9
Outdoor air thermistor or related abnormality
197
J3
Discharge pipe temperature thermistor or related abnormality
197
J6
Heat exchanger temperature thermistor or related abnormality
197
J8
Liquid pipe temperature thermistor or related abnormality
197
J9
Gas pipe temperature thermistor or related abnormality
197
L3
Electrical box temperature rise
199
L4
Radiation fin temperature rise
201
L5
Output overcurrent detection
203
P4
Radiation fin thermistor or related abnormality
197