COMBAT® CTCU UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL
SECTION 14: TROUBLESHOOTING 14.1 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
No
No
Turn on supplies.
Use 14.2 to test burner.
Use 14.5 to test fan.
Has burner “Locked Out”? No | The limit thermostat has |
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tripped. | No | Replace limit thermostat. | |
| See Section 11.3.2. |
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Yes | Yes |
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Use 14.2 to test burner. | Replace axial fan. |
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If problems persist, contact |
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Tel: +44 (0)1902 498733 |
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For your safety and optimum heater performance, use only ROBERTS GORDON® replacement parts.
Conduct Commissioning procedure as shown on Page 15, Section 10.
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