Welbilt MERRYCHEF conneX Service & Repair Manual page 68

6 Replacing components
LED Drive Status
Normal Operation (Run)
Overload (Hardware Current >10A)
Overload (Software Current >3.5A)
Output Phase Missing
Lock Motor
Over Voltage (>275VAC)
Under Voltage (<150VAC)
P1 – P2 link wire missing
Onboard Fuse Blown
Convection fan: motor speed controller control voltages & link positions
Oven
13A & 15A/16A
Variant
Input %
10
20 2.8
30 3.5
40 4.3
50
60 5.5
70
80 6.5
90
100 7.5
Convection fan: motor and motor speed controller tests
Ensure the following requirements have been met before starting the test:
The appliance has been disconnected from the power supply and protective measures have been taken to ensure

the power cannot be switched on again.
The appliance is cool.

The high voltage capacitors are discharged before commencing work.

Anti-static precautions have been taken.

The casing of the appliance has been removed.

Check the following:
1. All associated wiring and connections, from IO board X113 & X519 through the speed controller to the convection
fan motor.
2. Convection fan motor thermal cut-out (IP), two black wires.
3. Convection fan motor rotates freely / not seized.
4. Convection fan motor winding resistances:
±
Blue-red 7.5 Ω 10%
Red-yellow 7.5 Ω
Yellow-blue 7.5 Ω
Blue or red or yellow to earth (open circuit).
5.
With the oven panels refitted and the oven re-connected to the power supply check the fan speeds using visual view
in the service mode.
Merrychef conneX ® service and repair manual
Flash rate
On Continuously
1
2
3
3
5
6
7
2 then 3
30A
0 - 10 Volts
2 2
2.8
3.5
4.3
5 5
6
6 7
8
7 9
10
±
10%
±
10%
Additional details
Fan motor operating normally
Fan motor off (switched off in less than 1ms)
Fan motor off (switched off after 5s)
Fan motor off (switched off after 2s)
Fan motor off (switched off after 2s)
Fan motor running in safe mode (1000rpm)
Fan motor running in safe mode (1000rpm)
Fan motor off (switched off in 100ms)
Fan motor off (switched off after 55ms)
Link positions are factory pre-set based on the model
of convection fan used in the conneX ovens. The link
positions must not be altered without express
instruction from Merrychef.
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Recovery
10s
10s
10s
10s
10s
10s
10s
10s
10s
68