convotherm error E03.0.0.0

[fixbear]

What model and software version do you have. If it’s a combi-oven, Like a OGS 10-10 it’s a fan error. Overload, high temp motor winding.

Remember that Convotherm makes steamers as well as ovens. So you need to let us know what your working on.

[fixbear]

This might help;

• Fan motor has excessive temperature in the
winding

a) One phase is missing from the power connection

b) Fan motor defective

c) One phase is not connected through from the
contactor

d) Miniature fuse F10 (6.3 A or 10 A for
floor models) has tripped

e) Thermoprotection contact in the motor winding
(bimetal) defective or interrupted

[Irishman]

I’m slacking today. model # OES – 6.20
combi oven

[Irishman]

thanks for these options to check out. I will be heading back to this job sometime today. greatly appreciated

[jmholland]

I replaced the fan motor and the blower. The oven worked for one week and now I have the error code message again

[fixbear]

OES 6.20 I don’t show. And the 6.10 doesn’t use E3.0.0

So the question is is this a Mini oven or full sized OES?

[fixbear]

Check your leg voltages and amps to the fan. It could be in the contactor or wiring causing the motor winding thermistor to trip high temp. Also ohm the thermistor.

[jmholland]

Okay. the repairman is on the way. Do you think the new motor is bad after we installed it and it worked for three days

[jmholland]

we are doing all of that now. We don’t know how to trouble shoot if the fan motor is getting excessive temperature in the winding

[fixbear]

Three things make a motor overheat. One is phase imbalance. Whether it’s voltage or phase angle. Phase angle will create a “Shake” in the motor. Both will create different amp loads. When they vary more than 10%, you have a problem. Sometimes it can go all the way back to your power company. Be aware this includes a high resistance contact on one leg. whether it be a wire join or a connector, or the contactor.

2, Lack of ventilation of the windings. Broken cooling fan blades, grease buildup inside the motor, or improperly placed guards. Fan motor to housing gaskets on some machines. Cooling air ducting

3 Last is overload. Usually bearings or grill. But I’ve seen a amazing amount of foil in some units.

And I forgot to mention improper wiring. Especially voltage taps in the motor.

They imbed a temperature probe in the windings of the motor to check it for safety problems. Like overload or power problems. Be aware, they are DC and cannot be wired backwards. if so, they will error.

[olivero]

I would be looking at what’s driving the motor at this point, it’s a single phase power supply from the wall, the motor is using 3 phase, 50 hz as it’s a german motor.

The Convotherm 4 uses VFD’s, I don;t think this unit uses a VFD but it uses a transformer if it’s anything like the OGS model.

Voltage into the unit and the 3 wires supplying power is where I would be looking.

Obviously the motor is not the problem if it was just replaced, so it’s either bad wires or bad voltage at thos point.