Crown EPX-3 Installation & Operation Manual page 16

Electric counter pan steamers
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T
ROUBLESHOOTING
Timer Motor
A defective timer motor will cause continuous operation in the TIME mode, with the timer dial failing to return to the
"0 - Minute" position.
To confirm timer motor condition, proceed as follows:
1. Carefully check motor wire leads and tighten loose connections.
2. Turn on power to the steamer.
3. Set timer dial (any setting beyond "0 - Minute"). If operation is correct, the motor will turn the dial toward "0 - Minute". If
the motor fails to operate, it is defective and the entire timer must be replaced.
4. Shut off power to the cooker.
Door Interlock Switch
Malfunction of the cooker door interlock switch prevents timer indicator lights from turning on and steam generator from
operating when the timer dial is set. If steam does not enter the compartment and the cooking indicator light fails to turn
on with the door latch securely engaged, the fault may be in the door interlock switch. Proceed as follows:
1. Turn off power to the cooker.
2. Disconnect wires to the door switch terminals.
3. Connect an ohmmeter between the terminals of the switch. The switch is marked "C" for common, "NC" for normally
closed and "NO" for normally open.
4. Actuate the switch by closing the cooking compartment door. If a zero reading cannot be obtained between the C and
NO terminals, the switch is defective and must be replaced.
5. Remove the ohmmeter and replace the leads on switch terminals.
Indicator Lights
If the cooker compartment functions correctly, with the single exception that the indicator light fails to light during
operation, the fault is a defective indicator light. A "burned out" or defective light is verified by using an AC voltmeter at
the leads, with input power on the selector switch in the correct position for that timer, the timer set, and the door latches
closed. If 240 volts is present, the fault is in the indicator light and requires replacement. If 240 volts is not present, the
fault is in the wiring or control components (selector switch, timer or door switch).
Buzzer
If the buzzer does not sound at the termination of the operator-selected timer setting (timer dial returned to "0 - Minute"
position), the fault may be a defective buzzer. Buzzer operation is verified using an AC voltmeter at buzzer coil
connections with input power on and selector switch and coinciding timer dial set at the "0 - Minute" position. If voltage is
240 volts, the fault is in the buzzer, which must be replaced. If 240 volts is not present, the fault is in the wiring or control
components (timer or selector switch).
Wiring
Disconnect the power supply to the appliance before cleaning or servicing.
Using an ohmmeter, wiring continuity between the connections shown on the wiring diagram is readily verified. This is
best done in stages, removing only those wires required for each continuity check. As each lead is replaced, it should be
checked for evidence of corrosion, and cleaned if necessary. All leads must be tightly attached so as to provide a good
electrical connection.
16
PAGE
OF 20
WARNING
INSTALLATION & OPERATION MANUAL 10211 REV 0 (04/21)
Electric Counter Pan Steamers

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