DUALAIR® HEATING AND COOLING UNITS INSTALLATION OPERATION AND SERVICE MANUAL
SECTION 15: TROUBLESHOOTING 15.1 General
WARNING
Explosion Hazard
Installation must be done by a registered installer/ contractor qualified in the installation and service of
Failure to follow these instructions can result in death, injury or property damage.
Start
Are gas & electrical
supplies on?
Yes
Is Red lockout
warning light on?
No
Does the fan run?
Yes
With external controls on, does the burner continue through the heating cycle?
Yes
Heater Operating
TROUBLESHOOT ENDS.
No
Yes
No
Yes
No
No
Turn on supplies.
Use 15.2 to test burner.
Press the white button on
the combination fan/limit No thermostat. Does the
fan run now?
Yes
See sections 5.3 & 11.3 to
check combination No fan/limit thermostat settings.
Does the fan run?
Has burner “Locked Out”? No
Yes
Use 15.2 to test burner.
If problems persist, contact ROBERTS GORDON® at Tel: +44 (0)1902 498733 or
Use 15.5 to test fan.
Replace combination fan/limit thermostat.
Is combination fan/limit thermostat set correctly? No See sections 5.3 &11.3.
Adjust or replace
as necessary.
For your safety and optimum heater performance use only ROBERTS GORDON® replacement parts.
Conduct Commissioning procedure as shown on Page 21, Section 11
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