15
Instruc
tions f
or user - 9120-34315 - DSX - 801049 - No
v
ember 2012 v1.00
9. Maintenance
N.B. Maintenance work must only be carried out by a qualifi ed tradesperson familiar with instantaneous water heaters.
Plastic surfaces and sanitary fi ttings should only be wiped with a damp cloth.
Never use abrasive or chloric cleaning agents or solvents.
Outlet fi ttings (tap nozzles and shower heads) should be unscrewed and cleaned at regular intervals.
The electrical and plumbing components should be inspected regularly by a competent person to ensure proper functioning and opera-
tional safety. Water quality should be considered when determining the frequency of inspection.
Each time the appliance is emptied (e.g. due to work on the plumbing system, if there is a risk of freezing or in case of maintenance), the
appliance must be vented by opening and closing the hot water tap until all air has been eliminated from the water heater and no more
air emerges before re-connecting to the electrical supply.
Problem
Cause
Solution
Water stays cold
Digital display does not light up
Circuit breaker tripped
Reset circuit breaker
STCO tripped
Contact Zip Service to reset STCO
Display fl ashes error
symbol ‘screwdriver’
Control system has switched off
Switch power supply off and on. If the symbol
‘screwdriver’ still fl ashes contact Zip Service
Poor hot water fl ow rate
Outlet fi tting dirty or
calcifi ed
Clean shower head or tap nozzle
Fine fi lter dirty or calcifi ed
Contact Zip Service to clean fi ne fi lter
Selected temperature not achieved
Excessive water fl ow rate
Reduce water fl ow rate at the outlet
Cold water has been added
Set for required
temperature and tap hot water only
Screen displays “Inlet temp too
high”
Inlet temperature exceeding set point
Reduce inlet temperature
No response to key press
Appliance cover not fi tted correctly
Contact Zip Service
Repairs should only be carried out by qualifi ed tradespersons familiar with electric instantaneous water heaters.
All service work should be performed by an authorized Zip service technician – for details of the full range of services available call Zip
Service on 1800 460 222.
When calling for service, please always specify the appliance model and serial number.
The following table will be helpful in determining the causes of some common problems and their solutions.
10. Fault finding
