Service Manual for
AHPO / EPO Proofer Oven
10
Earlier
models
Later
models
Figure 11. Lamps
Some earlier model units use a standard, clear glass, 120 V
lamp which are rated for oven use. Later model units use
12 V Halogen bulbs.
Avoid touching the glass envelope of a Halogen
bulb with your fingers as this will cause premature failure
of the bulb. If the bulb has been touched, clean it off with
an alcohol wipe. Always replace a bulb with one of proper
ratings for the unit.
1. Turn unit off and allow it to cool.
2. Unscrew and remove the Lens Cover and Lens Gasket.
3. Unscrew (old style) bulb or unplug (new Halogen style)
bulb.
4. Screw the new bulb in tight when replacing old style
bulbs. Halogen bulbs should be plugged in firmly. Avoid
touching the glass bulb with your fingers, use a cloth
or cloth gloves when installing a new bulb. If bulb is
touched use alcohol wipe to clean it.
5. Briefly turn unit on and check for proper bulb lighting.
6. Turn unit off.
7. Place the Lens Gasket on the Lens Cover. Make sure it
is centered properly. If Lens Gasket is damaged replace
it.
8. Screw the Lens Cover over the Bulb tight making sure
the Lens Gasket seals against the Light Socket.
9. Return the unit to service; ensure it is operating correctly.
CONTROL PANEL COOLING FAN
Disconnect the electrical power to
the unit and follow lockout / tagout procedures.
This fan is mounted to a ventilated metal panel to the right
of the Operator’s Control Panel and on the right hand side
of the unit.
When this panel is removed, you will also have access to
the Hi-Limit Thermostat, AC Power Contactor and, on the
later units, the Halogen Lamp Transformer and the Oven/
Proofer Buzzer.
Figure 12. Control Panel Cooling Fan
1. Remove the screws securing the Louvered Vent on the
right side of the unit below the Oven Section. Retain
the screws for reuse.
2. Tag and disconnect the cooling fan wires.
3. Remove the four nuts securing the fan to the panel.
Retain the nuts for reuse.
4. Remove the fan.
5. Reverse this procedure to install replacement fan.
6. Restore the unit to service and check for proper operation.
Also, verify proper fan rotation.
PROOFER LIGHTS CIRCUIT BREAKER
NOTE: Installing or replacing the Proofer Lights Circuit
Breaker only applies to models with halogen lights.
Disconnect the electrical power to
the unit and follow lockout / tagout procedures.
1. Place the Power Switches in the OFF position and follow
the Electrical Lockout and Tagout procedures.
2. Remove two screws securing the Access Panel.
3. Disconnect the jumper wires to the Proofer Lights Circuit
Breaker.
4. Squeeze the tabs on the failed Proofer Lights Circuit
