![background image](http://html1.mh-extra.com/html/daikin/erhq011ba/erhq011ba_installers-reference-manual_4704538060.webp)
Installer reference guide
59
EHBH/X16
Daikin Altherma - Low Temperature Split
4P313776-1 – 2012.05
12 Troubleshooting
12.3.4 Symptom: The pressure relief valve opens
12.3.5 Symptom: The water pressure relief valve
leaks
12.3.6 Symptom: The space is NOT sufficiently
heated at low outdoor temperatures
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
Possible causes
Corrective action
The expansion vessel is broken
Replace the expansion vessel.
The water volume in the
installation is too high
Make sure that the water volume
in the installation is below the
maximum allowed value (see
"6.2.3 To check the water
volume" on page 20 and To set
the pre-pressure of the
expansion vessel).
The water circuit head is too high The water circuit head is the
difference in height between the
indoor unit and the highest point
of the water circuit. If the indoor
unit is located at the highest point
of the installation, the installation
height is considered 0 m. The
maximum water circuit head is
10 m.
Check the installation
requirements.
Possible causes
Corrective action
Dirt is blocking the water
pressure relief valve outlet
Check whether the pressure
relief valve works correctly by
turning the red knob on the valve
counterclockwise:
Q
If you do NOT hear a
clacking sound, contact your
dealer.
Q
If the water keeps running
out of the unit, close both
the water inlet and outlet
shut-off valves first and then
contact your dealer.
Possible causes
Corrective action
The backup heater operation is
not activated
Check and make sure that:
Q
The backup heater
operation mode is enabled.
Go to:
Q
[A.5.1.1] > Installer
settings > Heat sources
> Backup heater >
Operation mode OR
Q
[A.8] > Installer settings
> Overview settings [5-
01]
Q
The thermal protector of the
backup heater has not been
activated. If it has, check:
Q
The water pressure
Q
Whether there is air in
the system
Q
The air purge operation
Press the reset button in the
switch box. See
"14.2 Components" on page 70
for the location of the reset
button.
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
Summary of Contents for ERHQ011BA
Page 83: ......