Fault Finding - gledhill GC2000/120/E-OV Design, Installation & Servicing Instructions

1. FAULT FINDING

NO HEATING - HOT WATER OK
1. Check that jumpers on pcb are in correct locations and the pcb has been
booted correctly.
2. Check that the heating programmer is set correctly and is calling for heating.
3. Check that the room thermostat setting is adequate and is calling for heating.
4. If both programmer and the room thermostat are calling for heating and the
heating is still not working then go to fault finding chart 1.
NO HOT WATER - HEATING OK
1. Check that jumpers on pcb are in correct locations and the pcb has been
booted correctly.
2. If a 2 channel clock has been fitted check that the hot water is selected 'ON.
3. If there is still no hot water then go to fault finding chart 2.
INSUFFICIENT OR INTERMITTENT HOT WATER - SPACE HEATING OK
1. Check that jumpers on pcb are in correct locations and the pcb has been
booted correctly.
2. If a 2 channel clock has been fitted check that the hot water is selected 'ON' .
3. If there is still no hot water then go to fault finding chart 3.
NO HEATING AND HOT WATER
1. Check that jumpers on pcb are in correct locations and the pcb has been
booted correctly.
2. Check that there is gas supply to the appliance.
3. Check that there is electrical supply to the appliance and the ON/OFF button
on the facia panel is switched on.
4. Check electrical supply is of the correct polarity.
5. If a 2 channel clock has been fitted, check that the heating cannot be selected
to 'on' without the hot water being selected to 'on' (programme selector set in
the position for 'gravity' operation).
6. If the appliance still does not work then go to fault finding chart 4.
Supplied By www.heating spares.co Tel. 0161 620 6677
FAULT FINDING
APPLIANCE CONTROL BOARD
The correct operation of the board can be
checked by carrying out the following proce-
dure:
• Switch off mains
• Check and if necessary insert correct
jumpers (1, 2 & 4 for 12kW 2, 3 & 4
for 18kW models and 1, 2, 3 & 4 for 25kW
models) to suit appliance type.
• Insert jumper 5
• Switch on mains
• The PCB will carry out functional checks
and then stop.
• Switch off mains
• Remove jumper 5
• Switch on mains to put into normal
operating mode.
During the functional checks the green LED's
1-4 will be switched on then off at 5 second
intervals
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