Merrychef conneX 12e - Page 28

3 Technical data
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Merrychef conneX
®
service and repair manual
28
Description
Features
Function
Rating
Trouble shooting
Magnetron Limit Stat(s)
Automatic reset.
Monitors surface
temperature. Normally
Closed, opens when
the magnetron surface
temperate gets too
hot.
Breaks control safety
circuit control voltage
signalling the IO Board
to de-energise heating
and microwave circuits
based on the
temperature of the
magnetron case. The
oven shuts down and
displays E117, E118.
Switched Voltage;
12VDC.
Resistance if open O.L.,
if closed = 0.
Opens at 125
o
C (257
o
F),
automatically closes
once magnetron case
temperature drops to
80
o
C (177
o
F).
Check continuity
through switch(es).
Check for 12VDC on
both sides of
switch(es).
Allow magnetron to
cool before testing.
A dirty air filter is a
major root cause of
this failure.
Check IO connections
& plugs on X513 &
X514
Check IO LEDs LD16 &
LD18.
Heating Element(s).
conneX 12e –
Single sheath
resistive heating
element sealed
terminal ends.
Heating element(s)
remain on for 30 secs
after opening the door.
Provides heat for the
oven cavity. When air
passes over the
surface, heat is
transferred into the
air.
Supply Voltage 230VAC
pulsed from the IO
Board to control power
(wattage).
conneX 12e –
Resistance: 19
between terminals.
Maximum power
2200W.
Check F3 & F4
Check Neutral
connections, EMI Filter.
Check resistance
ratings. Check IO
terminal connections
X200 & X210.
Check for opens, shorts
& grounds. Check IO
LEDs LD1 & LD25
Check Live supply
potential at heater
terminals.
Check Error Log for
E102 & E116 events.
Magnetron(s).
One Magnetron fitted
as standard.
Provides microwave
energy, 0 to 100%,
through the
waveguide(s) into the
oven cavity for
accelerated cooking.
At 50% power the
microwave circuit
cycles 20 seconds on /
20 seconds off.
conneX 12e - 800W per
magnetron,
7-8A at 230VAC.
See HV
Components in
Section 5.8 for
further rating
information.
(NOT TO BE
TESTED LIVE).
Follow all test
procedures in Section
5.8.
Check for opens, shorts
& grounds.
Check IO Board
connections X400,
X401, X403, X410, X411
& X412. Check IO LEDs
LD4, LD5 & LD21
Check Error Log for
E101 & E113 events.