page no. 34 of 40
VP
x Range Users, Installation & Servicing Instructions Doc Ref M205 issue 1.2 Nov 2018.
YES
YES
Burner Fired!
Has the main fan
started after the 30 second
delay?
NO
Is there
230V at terminal
'SW' on the Fan Command
Module?
• Check for 230V on terminals L & N
on Fan Command Module.
• Check for 230V between terminals
GV on Fan Command Module.
NO
Has
the main fan
started
NOW
?
NO
• Check the operation
of the main fan by
connecting it to
a permanent mains
supply.
NO
Replace Main
Fan Assembly!
YES
Replace Main
Fan Command
Manual!
Heater Working!
Does
the burner
go into high limit
trip after a period
of time?
• Check burner pressure for
correct setting.
• Check Overheat Stat for
incorrect limit setting.
• Check fan rotation.
• Remove the black cap and
press the reset button
Replace
Limit Stat!
YES
Continued from
previous page
Has
the main fan
started
NOW
?
Burner
STILL
in high
limit trip?
YES
The unit will have a single LED indicator and will provide
the following information :-
Steady on LED
Unit in standby mode (all outputs off)
1 LED Blink
Summer fan “ON” mode active.
2 LED Blinks
DC control signal received >2V, Heating mode gas valve
drive at maximum.
3 LED Blinks
Fan output on, (heating mode) Heating mode gas valve
drive follows DC input.
4 LED Blinks
DC control signal <2V. Heating mode now off but fan in
overrun mode (2.5 mins max)
Slow on off @ 50%
Auto Time Out has occurred. (i.e. DC control signal
received >2V but no trigger from sequence controller
within 5 mins.