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UNIT HEATER
Section 8. FAULT FINDING
Following the replacement of parts
carry out the Commissioning procedure as in Section 4.
Should these procedures not resolve any problem, please contact Combat Engineering Ltd.
NO NO
Is "Lockout " Check external controls
Start warning light are on & supply is sound
Assuming gas & electrical ON ?
supplies are on
YES
Test burner as
in 8.2
NO NO
Does the fan run? Press in white button Use 8.5 to test fan
on com bina tion
thermostat.
Fan runs now?
YES
See section 4.3 to Replace combination
check fan stat thermostat
settings
YES
YES NO NO
Does burner stop after Has burner Check for correct Check operation &
Running for several "Locked out" ? operation of fan setting of
minutes ? (with the combination stat.
c ont rols still on) YES YES Repa ir or repla c e
as necessary
NO
Use 8.2 to test burner
YES
Heater operating
8.1 General for Automatic Ignition
Warning
Fault finding should only be carried out by experienced engineers who fully understand the
operation of the burners.
There is a risk, including that of explosion,when burners are faulty and not repaired
correctly.
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