Welbilt MERRYCHEF eikon e2s - Installation; Safe Working During Electrical Installation

Merrychef eikon
®
e2s service and repair manual
29
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3 Technical data
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Description
Features
Function
Rating
Trouble shooting
Cooling Fan Capacitor
*Note: JP model has a
different cooling fan
Connects to the cooling
fan using a terminal
block
Stores and discharges
voltage to start and run
the cooling fan motor
400V, -25/70
o
C, 1.5µF
±5%
*JP Model
400-500V, -40/85
o
C,
3µF ±5%
Check for proper
microfarads.
Check for opens,
shorts, or grounds.
Warning: Capacitor
may have a stored
charge, discharge
before testing
Stirrer Motor(s)
Mounts directly on the
wave guide above the
cavity, supply voltage
connected directly
from the SRB. Driving
the stirrer antennae in
the horn area of the
microwave launch on
the cavity, through the
gear assembly
Drives a stirrer
antennae to evenly
distribute or scatter
microwaves into the
oven cavity
230VAC 2.7W.
Resistance 7 - 8W
Check for opens, shorts
or grounds
Check for locked rotor
(Power Off)
Check SRB connection
X20
Check SRB LED
Check for Live supply
potential at SRB X20
connection
VFD
(Motor Speed
Controller)
Takes 1PH AC supply
voltage and produces a
3PH DC square wave
frequency output
Provides an DC, 3-
phase switched mode
drive to the AC
convection motor and
is controlled by a 0-5
VDC signal from the
relay board (SRB). The
frequency output
allows the Main Blower
Motor to run at
variable speeds
1ph power supply.
Control Signal Voltage
5VDC output to SRB, 1-
5VDC return to
determine speed
percentage of
convection fan motor
(1-3.7VDC on 16A/13A
ovens). Output 3ph DC
square wave frequency
voltage
Check electrical
connection
Check SRB connections
X3 & X9
Check SRB LED
Check PWR & ST LED’s.
Check for 5VDC at pins
P1 (Blue) & P3 (Green).
Check for 1-5VDC at
pins P2 (Red) & P3
(Green)
Check Live supply
potential on VDF
Check for consistent
output voltage
between each phase
between Black, Brown
and Blue (Digital multi-
meter should be set to
VAC to do this check)
Check Error Log for
E106 events
Convection Motor
The convection motor
is a 3-phase AC motor
that runs at variable
speeds and is powered
by a motor speed
controller (VDF Drive).
The windings are
thermally protected
(two grey wires). The
fan will continue to run
once the oven is
switched off, until the
cavity temperature
drops below 50
o
C
(“Shutting down’’
displayed)
Provides variable
percentages of airflow
that is heated into the
oven cavity used for
accelerated cooking.
This is the convection
and impingement
process.
Supply Voltage: DC
square wave frequency
that simulates 3ph
voltages up to 220V at
100%
Resistance: 9W ±10%
across windings
Check for opens, shorts
or grounds
Check for locked rotor
(Power Off)
Follow VFD Drive
Trouble shooting
checks.