10
Installation instructions & user manual
9120-34378 v1.00 Sept 2020 - ZIP DEX Next / DEX12 Next
Technical support
Tel: 0345 6 005 005 email: [email protected] www.zipwater.co.uk
This instantaneous water heater was manufactured conscientiously and checked sev-
eral times before delivery . Should malfunctions nevertheless occur, it is usually only
due to a bagatelle . First attempt to switch the house fuses off and on again in order to
reset the electronics . Next, try to remedy the problem with reference to the following
table . In doing so, you will avoid unnecessary expense of customer service assistance .
DEX Next
Problem
Cause
Solution
Water stays cold,
touch display shows
power break
screen
Master fuse tripped
Renew or activate fuse
Safety pressure cut-out
tripped
Contact customer service
Water stays cold, dis-
play shows
error symbol
The appliance has
detected an error
Switch fuses off and on . If sym-
bol “wrench” is still indicated,
contact customer service
Flow rate of hot
water too weak
Outlet fitting dirty or
calcified
Clean shower head, jet regula-
tor or sieves
Fine filter dirty or calci-
fied
Let clean fine filter by customer
service
Selected temperature
is not reached
Power limit reached
Decrease the warm water flow
at the tap
Cold water has been
added via the tap
Tap hot water only; set temper-
ature, check outlet temperature
Sensor keys does not
respond correctly or
only sporadically
Display glass is wet
Dry display by wiping it with a
soft cloth
4. Trouble-shooting and service
• Repairs should only be carried out by
competent persons familiar with elec-
tric instantaneous water heaters .
• All service work should be performed
by an authorized Zip service engineer
– for details of the full range of ser-
vices available call Zip on 0345 6 005
005 .
• When calling for service, please always
specify the appliance model and serial
number .
