10
Instruc
tions f
or user - 9120-25532 - CEX9-U - 801041 - No
v
ember 2012 v1.00
11. Cleaning and maintenance
Problem
Cause
Solution
Water stays cold
Circuit breaker tripped
Reset circuit breaker
STCO tripped
Contact Zip Service to reset STCO
Display fl ashes error
message ‘ER’
Control system has switched off
Switch power supply off and on. If ‘ER’ 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
‘MAX’ lights up
Excessive water fl ow rate
Reduce water fl ow rate at the outlet
Selected temperature not achieved
‘MAX’ does not light
Cold water has been added at the outlet
Set for required
temperature and tap hot water only
Symbol ‘SUN’ fl ashes
Inlet temperature exceeding set point
Reduce inlet temperature
Water heats up but display fails to
operate
Display lead plug not properly connected
Contact Zip Service to connect display lead
correctly
12. Fault finding
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.
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 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 qualifi ed tradesperson to ensure proper functioning and
operational 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.
