Troubleshooting; Error Codes And Description - Daikin FLKS25BVMB Service Manual

SiBE05-311

4. Troubleshooting

4.1

Error Codes and Description

System
Indoor
Unit
Outdoor
Unit
Service Diagnosis
Code Indication Description
00
Normal
U0
Insufficient gas
U2
Over-voltage detection
U4
Signal transmission error (between indoor and outdoor units)
A1
Indoor unit PCB abnormality
A5
Freeze-up protection control or high pressure control
A6
Fan motor or related abnormality
C4
Heat exchanger temperature thermistor abnormality
C9
Room temperature thermistor abnormality
E5
OL activation (compressor overload)
E6
Compressor lock
E8
Input over current detection
EA
Four way valve abnormality
F3
Discharge pipe temperature control
F6
High pressure control in cooling
H6
Position sensor abnormality
H8
CT or related abnormality
H9
Outdoor air thermistor or related abnormality
J3
Discharge pipe temperature thermistor or related abnormality
J6
Heat exchanger temperature thermistor or related abnormality
L3
Electrical box temperature rise
L4
Radiation fin temperature rise
L5
Output over current detection
P4
Heat radiation fin thermistor or related abnormality
: Displayed only when system-down occurs.

Troubleshooting

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