Troubleshooting; Error Codes And Description - Daikin K-Series Service Manual

SiBE061121.book Page 76 Monday, April 25, 2011 3:21 PM

Troubleshooting

4. Troubleshooting

4.1

Error Codes and Description

System
Indoor
Unit
Outdoor
Unit
76
Error Codes
00
Normal
U0★
Refrigerant shortage
U2
Low-voltage detection or over-voltage detection
U4
Signal transmission error (between indoor unit and outdoor unit)
UA
Unspecified voltage (between indoor unit and outdoor unit)
A1
Indoor unit PCB abnormality
A5
Freeze-up protection control or heating peak-cut control
A6
Fan motor (DC motor) or related abnormality
Radiant panel temperature rise, indoor electronic expansion
A9
valve (motor operated valve) abnormality, freeze-up protection
control
C4
Indoor heat exchanger thermistor or related abnormality
C9
Room temperature thermistor or related abnormality
CE
Radiant panel thermistor or related abnormality
E1
Outdoor unit PCB abnormality
E5★
OL activation (compressor overload)
E6★
Compressor lock
E7
DC fan lock
E8
Input overcurrent detection
EA
Four way valve abnormality
F3
Discharge pipe temperature control
F6
High pressure control in cooling
H0
Compressor system sensor abnormality
H6
Position sensor abnormality
DC voltage / current sensor abnormality (25/35 class)
H8
CT or related abnormality (50 class)
H9
Outdoor temperature thermistor or related abnormality
J3
Discharge pipe thermistor or related abnormality
J6
Outdoor heat exchanger thermistor or related abnormality
L3
Electrical box temperature rise
L4
Radiation fin temperature rise
L5
Output overcurrent detection
P4
Radiation fin thermistor or related abnormality
U7
Signal transmission error on outdoor unit PCB (50 class only)
★
: Displayed only when system-down occurs.
Description
Service Diagnosis
SiBE061121
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