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Troubleshooting
Installer reference guide
195
EPGA11~ EAV23DA6V
Daikin Altherma 3 H F
4P606487-1 – 2019.12
Error code
Detailed error code Description
C5
00
Heat exchanger thermistor
abnormality
CJ
02
Room temperature sensor
problem
E1
00
OU: PCB defect
E2
00
Leakage current detection
error
E3
00
OU: Actuation of high
pressure switch (HPS)
E4
00
Abnormal suction pressure
E5
00
OU: Overheat of inverter
compressor motor
E6
00
OU: Compressor startup defect
E7
00
OU: Malfunction of outdoor
unit fan motor
E8
00
OU: Power input overvoltage
E9
00
Malfunction of electronic
expansion valve
EA
00
OU: Cool/heat switchover
problem
EC
00
Abnormal increase tank
temperature
EC
04
Tank preheating
F3
00
OU: Malfunction of discharge
pipe temperature
F6
00
OU: Abnormal high pressure in
cooling
FA
00
OU: Abnormal high pressure,
actuation of HPS
H0
00
OU: Voltage/current sensor
problem
H1
00
External temperature sensor
problem
H3
00
OU: Malfunction of high
pressure switch (HPS)
H4
00
Malfunction of low pressure
switch
H5
00
Malfunction of compressor
overload protection
H6
00
OU: Malfunction of position
detection sensor
H8
00
OU: Malfunction of compressor
input (CT) system