Chart 1. Motor does not run
Start
Is there electrical continuity
across both live and
neutral paths of R.F.I.
filter?
Is voltage between L and N
on main terminal block
230V?
Is voltage between input to
door switch and Neutral
230V?
With door closed is output
from door switch 230V?
Is voltage between live and
terminal T2 on door relay PCB
230v when timer is turned on
and start switch depressed?
Is voltage at terminal d1 on
timer 230v when the timer is
turned on?
Is voltage at terminal T3
on door relay PCB 230v
when timer is turned on?
Substitute capacitor. Does
motor run?
Check door closed, timer
ON electrical supply ON.
Depress start switch.
Exchange R.F.I. filter,
does motor start?
Correct as necessary does
motor start?
Check fuse and mains
cable for continuity, does
motor start?
Exchange door switch
does motor start?
Exchange timer. Does
motor start?
Exchange timer. Does
motor start?
No
No
No
Exchange door relay PCB.
Does motor start?
Check br/w wiring from
RFI filter to door switch.
Check connections clean
and tight, does motor
start?
Yes
Yes
Yes
Yes
Refit capacitor, change
motor.
No
Yes
Yes
Yes
Yes
No
No
No
No
No
No
Yes
Yes
No
No
No
Yes
Yes
No
No
Yes
Yes
With motor running does
gas attempt to light?
Does gas light?
Does gas stay on?
Machine operating. Instruct
users as necessary?
Yes
Yes
Yes
Yes
Yes
Refer to chart 3
Refer to chart 4
Refer to chart 2
No
No
Yes
8
FAULT FINDING
In the event of an electrical fault carry out the preliminary electrical system checks i.e.
earth continuity, polarity, and resistance to earth.
Use each chart to locate the fault causing the dryer to operate incorrectly as follows:
Chart No:
1 Motor does not run.
2 Motor runs but full sequence control does not produce ignition spartk.
3 Motor runs, Full Sequence Control produes ignition sparks, but gas does not ignite.
4 Motor runs, gas ignites but burns for only a short period.
