Welbilt MERRYCHEF eikon e2s - Mains Voltage Components (Casing Removed)

Merrychef eikon
®
e2s service and repair manual
64
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5 Service information
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5.9 Mains voltage components (casing removed)
Convection fan: motor
The convection fan motor is a 3-phase AC motor having a maximum speed of approximately 7000 rpm (approximately 5200
rpm 16A/13A ovens) controlled by a motor speed controller.
The windings are thermally protected. In the event of a thermal fault, the trip inside the motor (IP) will open circuit and cause
the oven to shut down generating the E104 / E115 error code.
Convection fan: motor speed controller
The convection motor speed controller provides a 3-phase AC switched mode drive to the convection motor and is
controlled by a 0 to 5 Volt signal from the SRB (connection X3) on 30A ovens and a 0 to 3.7 Volt signal on 13A & 16A ovens.
This allows the motor to be adjusted from approximately 1400 rpm to 7000 rpm (5200 rpm) in steps of 1%.
§ Door open, Approx. 1400 rpm (10% @ 1V).
§ Door closed (not cooking), Approx. 2500 rpm (31% @ 1.8V).
§ Door closed heating up or ‘Shutting Down’, Approx. 3500 rpm (50% @ 2.5V).
§ Door closed (cooking), speed as specified by program or setting up to a maximum of 7000 rpm (100% @ 5V).
Convection fan: motor speed controller LED status display
The VDF contains two diagnostic indicators (LEDs) to display the drives operational status;
LED
Drive Status
Colour & flash
Sequence
Flash rate
Colour & sequence after
recovery
ST (Status)
Normal Operation (Run)
Green
1 Sec. On/Off
NA
Overload (120%-160%Full Load)
Red
On Continuously
Green
1st (Drive timed out)
Red
0.25 Sec On/Off
NA
Short Circuit
Red
1 Sec. On/Off
NA
Undervoltage
Red/Yellow
0.25 Sec. On/Off
Red/Yellow/Green
Overvoltage
Red/Yellow
1 Sec. On/Off
Red/Yellow/Green
Stop
Yellow
On Continuously
NA
Phase Loss Detection
Yellow
0.05 Sec. On/0.06 Sec. Off
NA
Communication Error
Green/Red
1 Sec. On/Off
Green
PWR (Power)
Bus and Logic Power Supply
Green
On continuously
NA
Convection fan: motor speed controller control voltages & linkage positions
Oven Variant
13A, 15A/16A & 20A
30A
Input %
0 - 5 Volts
10
1
1
20
1.4
1.4
30
1.8
1.8
40
2.2
2.2
50
2.5
2.5
60
2.7
3
70
3
3.5
80
3.2
4
90
3.5
4.5
100
3.7
5
Linkage positions are factory pre-set based on the
model of convection fan used in the e2s. The link
positions must not altered without express instruction
from Merrychef.