Roberts Gorden COMBAT CTU 22 TO 115 - Manual (Page 39)

SECTION 15: T ROUBLESHOOTING
33
15.2 Troubleshooting For Automatic Ignition Burner Systems
Heater Operating
TROUBLESHOOT ENDS. No
Trace fault in supervision
system. See Section 16.3.
No Yes Is red lockout light on?
No
Is the flame current at
least 1 µAmp DC when
the flame lights?
Ignition control faulty
replace.
See Section 15.6.
Is HT lead okay and
connected?
Is spark electrode okay?
Yes
Replace valve.
Is the gas valve operating?
To test valve,
see Section 15.4.
No Does the flame light? No
Yes
Wait 30 - 40 seconds.
Is ignition spark operating? No
Yes
Flue fan faulty replace
Burner control faulty or plug
in connections faulty. Repair
or replace as necessary
Check for too much flue/air inlet
duct. Check for blockage in
combustion air circuit.
Check for faulty air pressure
switch. See section 16.5.
Does air pressure switch
change over?
No
Yes
Has the thermostat limit
thermodisc operated or light
faulty? Reset or replace as
necessary.
Is 230 V supply at fan
connections?
Does flue fan run?
No
Are external controls on? Yes
Yes
Is the green light on? No
Yes
Is red lockout light on?
No
Yes
Press in lockout reset button
on rear of heater or remote
reset button if fitted.
Turn on supplies.
Are gas & electrical
supplies on?
Yes
Start
No
Yes
No
If problems persist, contact
ROBERTS GORDON ® at
Tel: +44(0) 121 506 7709
www.rg-inc.com
WARNING
Electrical Shock Hazard
Do not touch ignition components.
Voltage from ignition components is high.
Failure to follow these instructions can
result in death or electrical shock.
There are two burner controls used: Honeywell S4563C and
S4565C. They both have similar operating sequences. To
measure flame current, connect a 0 - 50 μA DC meter in
series with the flame probe. If the meter reads negative
values, then reverse the test leads.
For your safety and optimum heater performance,
use only ROBERTS GORDON
® replacement parts.
Conduct Commissioning procedure as shown
on Page 24, Section 11.