Morco EUP6 - Maintenance; Casing Removal Procedure; Troubleshooting Common Issues

11
4. MAINTENANCE
To maintain the machine at maximum efciency, have a Gas Safe
Engineer or other qualied personnel perform a maintenance
check at least once a year.
Before cleaning or performing maintenance, opening or disas-
sembling the panels, switch off the device and turn off the gas
supply. Check the main burner and the pilot ame, the ignition
electrode, the safety valve and that there is no gas or water lea-
kage. Check that there is nothing obstructing the passages within
the heat exchanger or ue.
To clean the outside of the panels utilize a cloth with soap and
water. Do not use solvents, powders or abrasive sponges.
Do not clean the device and/or its parts with ammable materials
(e.g. petrol, alcohol, diesel etc.).
4.a Removing the casing
To remove the outer casing follow the steps below:
- Remove the selector knobs (A and B)
- Remove the screws (C)
- Pull the bottom of the casing forwards until clear of the gas/
water spindles
- Shift the casing upwards to free it from the upper and lateral
hooks
- Shift the casing forwards
- To reinsert the casing, follow the above steps in reverse order.
g. 6
PROBLEM CAUSE SOLUTIONS
There is no spark - appliance spark wire is disconnected
- piezoelectric mechanism broken
- the electrode is damaged
- reconnect
- test, replace
- replace
The pilot does not switch on when there
is a spark
- pilot injector blocked
- electrode activation position needs
changing
- no gas supply
- air in the gas tubes
- clean by immersing in solvent or replace
- adjust
- open the appliance gas isolation valve
- purge air by turning on all gas rings on
hob for 30 seconds
The pilot does not stay on - thermocouple faulty
- broken magnetic valve
- ue sensor faulty or activated
- replace
- replace
- check ueing/ventilation
- replace
Pilot on but the main burner does not
ignite
- insufcient water pressure
- the diaphragm is broken
- Increase the external water supply
pressure
- rotate the knob B counter clockwise
- replace
The burner does not switch off when the
water turns off
- contamination on the gas valve seat
- gas valve push rod is locked in the open
position
- check the gas pressure
- test, clean
- Check the correct operation of the cold
water push rod , dis-assemble, clean or
replace
- if the inlet gas pressure exceeds the
specication replace the pressure
regulator on the external bottle or tank
Delayed burner activation - pilot burner ame is too far from main
burner ame or it is too short
- check inlet gas pressure, clean injector
and pilot burner
The heat exchanger ns becomes sooty
in a small amount of time
- poor draught, adverse weather condi-
tions or dusty surroundings
- yellow ame
- excess gas consumption
- check the ue installation
- check the gas type and clean the burner
- check gas pressure and adjust
4.b Troubleshooting: problems and solu-
tions
For the best functioning of the water heater, to prolong its lifetime
and ensure that it is always safe, it should be inspected at least
once a year by a gas safe engineer. The gas safe engineer is to
perform the following maintenance operations:
- Remove any rust from the burner
- Remove any deposit from the electrodes
- Clean the combustion chamber
- Check the ignition, switching off and general functionality of the
appliance
- Check that the gas and water pipes and connections are sealed
Warning: the following repair instructions are only to be perfor-
med by Gas Safe Engineers or other qualied personnel.