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12 Troubleshooting
Possible causes
The disinfection operation was
stopped manually: with the user
interface displaying the DHW
home page and its user
permission level set to Installer,
the
button was pressed
during disinfection operation.
12.4
Solving problems based on error
codes
When a problem happens, an error code appears on the user
interface. It is important to understand the problem and to take
measures before resetting an error code. This should be done by a
licensed installer or by your local dealer.
This chapter gives you an overview of all error codes and the
content of the error code as it appears on the user interface.
For a more detailed troubleshooting guideline for each error, please
see the service manual.
12.4.1
Error codes: Overview
Error codes of the outdoor unit
Error code
Detailed error
code
A5
00
E1
00
E3
00
E5
00
E6
00
E7
00
E8
00
EA
00
H0
00
H3
00
Installer reference guide
82
Corrective action
Do NOT press the
button
while the disinfection function is
active.
Description
OU: High pressure cooling/Peak
cut/ freeze protection problem.
Please contact your dealer.
OU: PCB defect.
Power reset required.
Please contact your dealer.
OU: Actuation of high pressure
switch (HPS).
Please contact your dealer.
OU: Overheat of inverter
compressor motor.
Please contact your dealer.
OU: Compressor startup defect.
Please contact your dealer.
OU: Malfunction of outdoor
unit fan motor.
Please contact your dealer.
OU: Power input overvoltage.
Please contact your dealer.
OU: Cool/heat switchover
problem.
Please contact your dealer.
OU: Voltage/current sensor
problem.
Please contact your dealer.
OU: Malfunction of high
pressure switch (HPS)
Please contact your dealer.
Error code
Detailed error
code
H6
00
H8
00
H9
00
F3
00
F6
00
FA
00
JA
00
J3
00
J6
00
L3
00
L4
00
L5
00
P4
00
U0
00
U2
00
U7
00
ERLQ004~008CA + EHVH/X04+08S18+26CB
Description
OU: Malfunction of position
detection sensor.
Please contact your dealer.
OU: Malfunction of compressor
input (CT) system.
Please contact your dealer.
OU: Malfunction of outdoor
air thermistor.
Please contact your dealer.
OU: Malfunction of discharge
pipe temperature.
Please contact your dealer.
OU: Abnormal high pressure
in cooling.
Please contact your dealer.
OU: Abnormal high pressure,
actuation of HPS.
Please contact your dealer.
OU: Malfunction of high
pressure sensor.
Please contact your dealer.
OU: Malfunction of discharge
pipe thermistor.
Please contact your dealer.
OU: Malfunction of heat
exchanger thermistor.
Please contact your dealer.
OU: Electrical box temperature
rise problem.
Please contact your dealer.
OU: Malfunction of inverter
radiating fin temperature rise.
Please contact your dealer.
OU: Inverter instantaneous
overcurrent (DC).
Please contact your dealer.
OU: Malfunction of radiating
fin temperature sensor.
Please contact your dealer.
OU: Shortage of refrigerant.
Please contact your dealer.
OU: Defect of power supply
voltage.
Please contact your dealer.
OU: Transmission malfunction
between main CPU- INV CPU.
Please contact your dealer.
Daikin Altherma – Low temperature split
4P384973-1D – 2018.07
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