Installer reference guide
59
EHVH/X16
Daikin Altherma - Low Temperature Split
4P313777-1 – 2012.05
12 Troubleshooting
12.3.7 Symptom: The pressure at the tapping point
is temporarily unusual high
12.3.8 Symptom: Decoration panels are pushed
away due to a swollen tank
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
countermeasure before resetting the 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 indoor unit
The backup heater equilibrium
temperature has not been
configured correctly
Increase the “equilibrium
temperature” to activate the
backup heater operation at a
higher outdoor temperature. Go
to:
Q
[A.5.1.4] > Installer settings
> Heat sources > Backup
heater > Equilibrium temp.
OR
Q
[A.8] > Installer settings >
Overview settings [4-00]
Too much heat pump capacity is
used for heating domestic hot
water (applies only to
installations with a domestic hot
water tank)
Check and make sure that the
“space heating priority” settings
have been configured
appropriately:
Q
Make sure that the “space
heating priority status” has
been enabled. Go to [A.8] >
Installer settings > Overview
settings [5-02]
Q
Increase the “space heating
priority temperature” to
activate backup heater
operation at a higher
outdoor temperature. Go to
[A.8] > Installer settings >
Overview settings [5-03]
Possible causes
Corrective action
Failing or blocked pressure relief
valve.
Q
Flush and clean the
complete tank including the
piping between pressure
relief valve and the cold
water inlet.
Q
Replace the pressure relief
valve.
Possible causes
Corrective action
Failing or blocked pressure relief
valve.
Contact your local dealer.
Error code
Detailed error
code
Description
A1
00
Zero cross detection problem.
Power reset required.
Please contact your dealer.
AA
01
Backup heater overheated.
Power reset required.
Please contact your dealer.
Possible causes
Corrective action
UA
00
Indoor unit, outdoor unit
matching problem.
Power reset required.
7H
01
Water flow problem.
89
01
Heat exchanger frozen.
8H
00
Abnormal increase BUH
outlet water temperature.
8F
00
Abnormal increase BUH
outlet water temperature (DHW).
C0
00
Flow sensor/switch malfunction.
Please contact your dealer.
7H
02
Water circuit pressure is
too high.
U3
00
Under floor heating screed
dryout function not completed
correctly.
81
00
Leaving water temperature
sensor problem.
Please contact your dealer.
C4
00
Heat exchanger temperature
sensor problem.
Please contact your dealer.
80
00
Returning water temperature
sensor problem.
Please contact your dealer.
U5
00
User interface
communication problem.
U4
00
Indoor/outdoor unit
communication problem.
AC
00
Booster heater overheated.
Please contact your dealer.
EC
00
Abnormal increase tank
temperature.
HC
00
Tank temperature sensor
problem.
Please contact your dealer.
CJ
02
Room temperature sensor
problem.
Please contact your dealer.
H1
00
External temperature
sensor problem.
Please contact your dealer.
AA
02
External backup heater
overheated.
Please contact your dealer.
HJ
08
Water circuit pressure
is too high.
HJ
09
Water circuit pressure is
too low.
HJ
10
Water pressure sensor problem.
Please contact your dealer.
Error code
Detailed error
code
Description
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