Merrychef conneX 12e - Page 29

3 Technical data
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Merrychef conneX
®
service and repair manual
29
Description
Features
Function
Rating
Trouble shooting
HV Transformer(s).
One HV Transformer
fitted as standard.
Provides both the
stepped down and
stepped-up Voltages
for the for the
Magnetron(s).
Primary winding: 200 /
230 VAC. Secondary
winding to Magnetron
Filament = ELV, and
approximately 1:10
stepped up High
Voltage for microwave
circuit (NOT TO BE
TESTED LIVE).
See HV Components in
Section 5.8 for further
rating information.
*(208 / 240 VAC
see note 2).
Follow all test
procedures in Section
5.8.
Check for opens, shorts
& grounds.
Check IO Board
connections X403,
X410, X411 & X412.
Check IO LED 3 & 4
Check Error Log for
E101 & E113 events.
HV Capacitor(s).
One HV Capacitor fitted
as standard.
Internal discharge
resistor.
In conjunction with the
HV Diode(s) to double
the stepped-up voltage
from the HV
Transformer(s).
2,500 VAC, 0.95F3%
for 50Hz, 0.75F 3% for
60Hz.
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 open circuits
or shorts to ground.
Check IO Board
connections X403,
X410, X411 & X412.
Check IO LED 3 & 4.
Check Error Log for
E101 & E113 events.
HV Diode(s).
One HV Diode fitted as
standard.
In conjunction with the
HV Transformer(s) to
double the stepped-up
voltage from the HV
Transformer(s), for the
Magnetron DC supply.
See HV Components in
Section 5.8 for further
rating information
(NOT TO BE TESTED
LIVE)
16kV, 750mA (up to
50A surge)
-20
o
C to +135
o
C
Follow all test
procedures in Section
5.8
Check for open circuits
or shorts to ground.
Check IO Board
connections X403,
X410, X411 & X412.
Check IO LED 3 & 4.
Check Error Log for
E101 & E113 events.
Thermocouple.
Provides DCmV to the
IO Board (Relay Board)
that represents the
cavity temperature.
Two dis-similar metals
connected at the tip
that produce different
repeatable millivolts
while exposed to
different temperatures.
Green is positive, and
White is negative.
See chart below for
reference.
E111 error when
open circuit fault
exists.
Check resistance, a low
resistance of 3 to 5 is
OK.
Check for opens,
shorts to ground.
*Note 1: 12A fuse (F3) used in Americas
*Note 2: 208/240 HV Transformers used in most 60Hz applications
Always review country specific service parts lists for required replacements. Never use non-approved
alternatives. See section 6.18 for the Technical Data Summary Sheet.