PARRY AGF - Fault Finding

Parry-British Built for Purpose
IN107-9
15
Fault Finding
Malfunction
Test and Probable Cause
Solution
Piezo Ignitor not sparking
Short in the High-Tension Lead
Replace Lead
Fractured Electrode Insulator
Replace Electrode
No spark being generated at all.
Replace Piezo
Pilot burner will not light or stay
lit
Thermocouple / interrupter
connections not secure
Tighten Connection
TEST: Is there gas at the point
when holding the control knob in
the pilot position:
Yes
Check over temperature stat for
open circuit and then check
thermocouple voltage (min.
15mv)
Yes, very little
Check supply, then check pilot jet
for blockages and clean if
necessary.
No
Check Supply.
If all the above are OK control valve is faulty
Over temperature stat operates
Check if the temperature is over
220°C
If not, replace Control Stat
TEST: Check if the control stat
operates on temp. rise when set
point is low / 100°C
If yes, check calibration of the
control stat. (See Installation
instructions for details)
Manually reset over temperature
stat
If not working
Replace Control stat then
manually reset over temperature
stat.