State Water Heaters SCE 65-400, Installation, User And Service Manual

Page: 59 / 72

is
Warning
Maintenance may only by carried out by a service and maintenance engineer.
Green LED ON
and
Red LED ON.
This fault has three possible causes. To be able to determine the cause, you must allow the
fault to re-occur:
1. Reset the appliance by pushing the reset button once;
2. If nothing has happened, the reset button has already been pushed too many times (a
maximum of 5x in one warm-up cycle) and you should disconnect the appliance from the
mains and then put it back into operation. See paragraph
’7.3.2 Disconnecting the
appliance from the mains’ and step 3 to step 5 in paragraph ’7.2 Putting into operation’ .
3. Check which type of cause (a) or (b) occurs.
(a) three unsuccessful
attempts to start in a
row 1. No gas:
• Check whether gas valve is open.
• Check whether gas control opens (clicking of the gas
control).
• Check the gas control wiring.
2. No ignition:
• Check whether the glow igniter lights up.
• Check the glow igniter supply.
• Check the glow igniter wiring.
3. No flame detection:
• Check whether Phase (L) and Neutral (N) are correctly
connected (from the mains supply) to the appliance.
• Check whether ionisation pin is faulty.
• Check whether the wiring of the ionisation pin is properly
connected.
If the fault cannot be resolved or in case of repeated faults you
should contact your installer.
(b) Safety thermostat
has switched 1. The safety thermostat has correctly switched:
• Reset the appliance.
• Check whether the control thermostat is working.
• Check whether the maximum thermostat is working.
• Check that any circulation pump that may be present is
working.
2. The safety thermostat has switched incorrectly:
• Check whether the thermostat is broken.
• Check whether the thermostat sensor is broken.
If the fault cannot be resolved or in case of repeated faults you
should contact your installer.
Table 8.2 No hot water
Page 2 of 2
Characteristic Cause Measure Observation
Release R.1.0 Uk 59