Fault
Error text/description
code
63
No ground water flow
only
VWW
Error 23 has occurred three times in a
row
72
Flow temperature too high for under-
floor heating
Flow temperature is for 15 min. higher
than a set value (max. HK temp. +
compr. hysteresis + 2 K).
81
Coolant pressure too high
Error 27 has occurred three times in a
row
83
Coolant pressure too low. Check heat
source
Error 28 has occurred three times in a
row
84
Coolant pressure outside the range
Error 29 has occurred three times in a
row
90
Heating system pressure too low
Pressure <0.5 bar
Heat pump shuts down and goes into
operation automatically when the pres-
sure rises above 0.7 bar
Table 5.7 Fault-induced shutdown (contd.)
• Consult your expert technician about doing this.
h
Note!
Only an expert technician can remedy
the fault and reset the error code.
Once the expert technician has remedied the error and
reset the error he can restart the heat pump.
6
Warranty and customer service
6.1
Vaillant warranty
Vaillant provide a full parts and labour warranty for this
appliance.
The appliance must be installed by a suitably competent
person in accordance with the Gas Safety
(Installation and Use) Regulations 1998, and the manu-
facturer's instructions. In the UK 'CORGI' registered in-
stallers undertake the work in compliance with safe and
satisfactory standards.
All unvented domestic hot water cylinders must be in-
stalled by a competent person to the prevailing building
regulations at the time of installation (G3).
Terms and conditions apply to the warranty, details of
which can be found on the warranty registration card in-
cluded with this appliance.
Failure to install and commission this appliance in com-
pliance with the manufacturer's instructions may invali-
Operating Manual geoTHERM VWS/VWW 0020051578_01
All manuals and user guides at all-guides.com
Emergency
date the warranty (this does not affect the customer's
mode
statutory rights).
possible
6.3
To ensure regular servicing, it is strongly recommended
_
that arrangements are made for a Maintenance
Agreement. Please contact Vaillant Service Solutions
(0870 6060 777) for further details.
possible
possible
possible
_
Warranty and customer service 6
Vaillant Service
Operation 5
GB
27