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FAULT FINDING
Fault finding may only be carried out by appropriately qualified persons
9.1 Main fault finding chart - Lock-out indicator light is "OFF", but air heater will not
operate
no
yes
yes
no
no yes
yes
no
no
yes no yes
no
yes
yes
no
no yes
no
yes
yes
Is there continuity between
terminals 9 &10
Check electronic
ignition control
Is there a restriction in the
flue pipe or inlet grill
Is the wheel dirty
Determine what caused the
limit to trip
Place into normal operation
Check the mains
Check the time/tempeature
control
Is there continuity between
9 & 10 ?
Is there 230V between
11 & 12 ?
Is power venting operating?
Reset limit control
Check venter motor
Replace pressure switch
Is the thermostat above
room temperature and if
used is the time
clock"ON"
Set thermostat above room
temperature & if used make
certain the time clock is ON
Does the power venter
operate?
Is there 230V between
L&N?
Is there 230V between
1 & N ?
Check pressure switch
Connect or replace tubing
Correct fault
Is the pressure tubing
connected & in sound
condition?
Clean the venter wheel
9
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