Roberts Gorden DUAL AIR DAT90 - Manual (Page 38)

D UAL A IR ® H EATING AND COOLING U NITS I NSTALLATION O PERATION AND S ERVICE M ANUAL
32
15.2 Troubleshooting For Automatic Ignition Burner Systems
If problems persist, contact
ROBERTS GORDON ® at
Tel: +44(0) 190 249 8733
or www.rg-inc.com
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
Have limit thermostats
operated or light faulty?
Reset or replace as
necessary.
Is 230v 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
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 21, Section 11