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12 Troubleshooting
Installer reference guide
76
EBLQ+EDLQ011~0W1 + EK(2)CB07CAV3
Daikin Altherma low temperature monobloc
4P538847-1 – 2018.05
Error code
Detailed error
code
Description
L5
00
OU: Inverter instantaneous
overcurrent (DC).
Please contact your dealer.
P4
00
OU: Malfunction of radiating
fin temperature sensor.
Please contact your dealer.
U0
00
OU: Shortage of refrigerant.
Please contact your dealer.
U2
00
OU: Defect of power supply
voltage.
Please contact your dealer.
U7
00
OU: Transmission malfunction
between main CPU- INV CPU.
Please contact your dealer.
UA
00
OU: Indoor/outdoor combination
problem.
Power reset required.
Hydro part
Error code
Detailed error
code
Description
7H
01
Water flow problem.
Auto restart.
7H
04
Water flow problem during
domestic hot water production.
Manual reset.
Check the domestic hot water
circuit.
7H
05
Water flow problem during
heating/sampling.
Manual reset.
Check the space heating/cooling
circuit.
7H
06
Water flow problem during
cooling/defrost.
Manual reset.
Check the plate heat exchanger.
80
00
Returning water temperature
sensor problem.
Please contact your dealer.
81
00
Leaving water temperature
sensor problem.
Please contact your dealer.
89
01
Heat exchanger frozen.
89
02
Heat exchanger frozen.
Error code
Detailed error
code
Description
89
03
Heat exchanger frozen.
8F
00
Abnormal increase outlet
water temperature (DHW).
8H
00
Abnormal increase outlet
water temperature.
A1
00
Zero cross detection problem.
Power reset required.
Please contact your dealer.
A1
01
EEPROM reading error.
A1
00
EEPROM reading error.
AA
01
Backup heater overheated.
Power reset required.
Please contact your dealer.
AC
00
Booster heater overheated.
Please contact your dealer.
AH
00
Tank disinfection function not
completed correctly.
AJ
03
Too long DHW heat-up time
required.
C0
00
Flow sensor malfunction.
Manual reset.
C0
01
Flow switch malfunction.
Auto reset.
C0
02
Flow switch malfunction.
Manual reset.
C4
00
Heat exchanger temperature
sensor problem.
Please contact your dealer.
CJ
02
Room temperature sensor
problem.
Please contact your dealer.
EC
00
Abnormal increase tank
temperature.
EC
04
Tank preheating