EP18-72-IOMM-2015-7
Fulton Ltd
Page 35
MAINTENANCE - 4
4.8.1
TROUBLESHOOTING BOILER
Problem
Cause
Remedy
Circuit Live indicator
not illuminated
1.
Mains supply failure.
External circuit MCB requires resetting.
Fuses need replacing.
Indicator lamp needs replacing.
2.
Door interlock microswitch
not made.
Boiler Low Water
lamp illuminated and
Audible alarm sounds
1.
Insufficient water in the
boiler.
Check that the feedwater supply line valves are
open. Check that the ball valve in the tank is
operating correctly by removing the inspection cover
on the tank.
2.
Obstruction in the feedwater
line to the pump.
Check that the shut-off valve below the tank is open.
Remove
and clean the filter in the strainer. Check
that the non-return
valve is operating correctly.
3.
Air lock in the pump.
Bleed the pump at the point provided.
4.
Feedwater pump impeller
worn.
5.
Incorrect connections to
water level probes.
Check connections to water level probes.
6.
Faulty water level relay.
Check that each relay is pressed
firmly home on its
base.
High Pressure
Audible alarm sounds
1. On/Off Pressure Control
failure.
2. High pressure controller set
too close to on/off control
setting.
Feed Water Tank Low
water indicated
1. Low Water.
Check that water supply line valves are open. Check
the feedwater solenoid valve is opening.
2. Faulty water level relay.
Check that the feedwater relay is pressed firmly
home on its base.
Pump Fault indicated
1. Electrical fault in the
feedwater pump circuit.
Check the circuit fuse, replace as required.
2. Thermal
overload fitted to
the pump motor contactor
requires re-setting.
Check that the unit has been set to the correct
amperage and adjust if necessary. If the fault
continues after the controls have been reset, a
major fault exists which can only be corrected by
a competent person with correct electrical test
equipment.
3. Faulty pump overload.
Element Fault
1. MCB requires re-setting.
If the fault persists the element and the circuit must
be fully checked by a competent person.
Tank Low Water
indicated
1.
Insufficient water in the tank
Check
the valves in the feedwater supply line
are open. Check the feedwater solenoid valve is
opening.
Incorrect connections to the tank water level probes.
Faulty water level relay, check that each relay is
pressed firmly on to its base.
Note:
Unless a faulty element is allowing steam or water to escape it is safe to operate the boiler with the faulty
element fitted provided that the element selector switch has been switched off.
Note:
Open circuit element faults will not be detected by the element fault detection system.
