2-1. INTRODUCTIONThis section provides procedures for the checkout and replacement
of the various parts used within the blast chiller/freezer. Before
replacing any parts, refer to the Troubleshooting Section. It
will aid you in determining the cause of the malfunction.
2-2. MAINTENANCE HINTS1. Y ou may want to use a multimeter to check the electric
components.
2. When the manual refers to the circuit being closed, the
multimeter should read zero unless otherwise noted.
3. When the manual refers to the circuit being open, the multiĀmeter reads infinity .
2-3. COMPRESSOR, DRIER,These parts involve manipulating the refrigerant in the system.
EXPANSION VALVE,Any removal or adjustments to these parts must be handled by a
SIGHT GLASS, ANDcertified refrigeration expert.
CONDENSER FAN
2-4. DISPLA Y BOARD AND1. Remove the electrical power to the unit.
AUXILIARY DISPLA Y
BOARD
T o avoid electrical shock or pr operty damage, move the
power switch to OFF and disconnect main cir cuit breaker ,
or unplug cord at wall receptacle.
2. Using a Phillips head screwdriver, remove the two screws
securing the front panel, and lower the panel.
3. Pull the connector from the corner of the display board.
4. Using a flathead screwdriver , remove the screws securing
the bracket to the panel, and pull the bracket from the panel.
5. Using a flathead screwdriver , push in on the clips on the
plastic studs and pull the studs through the bracket. Remove
the display board from the bracket.
6. Install the new board in reverse order.
603 2-1
Model BCF-24/65/110, BCM-110
2-5. CONTROL BOARD1. Remove the electrical power to the unit.
T o avoid electrical shock or pr operty damage, move the
power switch to OFF and disconnect main cir cuit breaker ,
or unplug cord at wall receptacle.
2. Using a Phillips head screwdriver, remove the two screws
securing the front panel, and lower the panel.
3. Remove the two bolts (under unit) securing the control box.
4. Pull the box from the front of the unit.
5. Remove the four screws securing the control box top and
pull the top from the box.
6. Pull the connectors from the control board.
7. Label and pull the wires from the control board.
8. Using a flathead screwdriver, push in on the clips on the
plastic studs and pull the studs through the bracket. Remove
the control board from the box.
9. Install the new board in reverse order .
2-2 603
Model BCF-24/65/110, BCM-110
2-6. BUZZER1. Remove the electrical power to the unit.
T o avoid electrical shock or pr operty damage, move the
power switch to OFF and disconnect main cir cuit breaker ,
or unplug cord at wall receptacle.
2. Using a Phillips head screwdriver, remove the two screws
securing the front panel, and lower the panel.
3. Remove the two bolts (under unit) securing the control box.
4. Pull the box from the front of the unit.
5. Remove the four screws securing the control box top and
pull the top from the box.
6. Label and remove the wires to the buzzer .
7. Remove the two screws securing the buzzer to the bracket
and remove the buzzer from the bracket.
8. Install new buzzer in reverse order.
2-7. CONT ACTOR1. Remove the electrical power to the unit.
T o avoid electrical shock or pr operty damage, move the
power switch to OFF and disconnect main cir cuit breaker ,
or unplug cord at wall receptacle.
2. Follow steps 2 through 5 in the Control Board Section.
3. Using a flathead screwdriver , remove the two screws
securing the bracket to the box, and remove the bracket.
4. Label and remove the wires from the contactor .
5. Slide the contactor off the retainer.
6. Install new contactor in reverse order.
603 2-3
Model BCF-24/65/110, BCM-110
2-8. DOOR FRAME HEA TER1. Remove the electrical power to the unit.
T o avoid electrical shock or pr operty damage, move the
power switch to OFF and disconnect main cir cuit breaker ,
or unplug cord at wall receptacle.
2. Remove the door to the unit by removing the screws in the
lower hinge of the door.
3. Remove the control box from the unit, following steps 2
through 5 in the Control Board Section.
3. Remove the plastic tabs that secures the decorator covers
around the door opening, and remove the covers.
4. Peel the heater out of the groove and disconnect the wires
(inside control box) to the element, and remove the element
from the unit.
5. Install new heater in reverse order and press the plastic tabs
in place to secure the decorator covers (tabs included with new
heater).
2-9. EVAPORATOR FAN1. Remove the electrical power to the unit.
T o avoid electrical shock or pr operty damage, move the
power switch to OFF and disconnect main cir cuit breaker ,
or unplug cord at wall receptacle.
2. Using a Phillips head screwdriver, remove the two screws
securing the fan shroud, and pull out on the shroud.
3. Using a Phillips head screwdriver, remove the three screws
securing the fan guard, and remove the guard.
4. Remove the control box from the unit, following steps 2
through 5 in the Control Board Section.
5. Disconnect the wires (inside control box) to the fan.
6. Remove the three screws securing the fan to the evaporator
door, and pull the fan from the unit.
2-4 205
7. Install new fan in reverse order.
Model BCF-24/65/110, BCM-110
2-10. AIR PROBE AND1. Remove the electrical power to the unit.
EVAPORATOR PROBE
T o avoid electrical shock or pr operty damage, move the
power switch to OFF and disconnect main cir cuit breaker ,
or unplug cord at wall receptacle.
2. Using a Phillips head screwdriver, remove the two screws
securing the evaporator door, and pull out on the door .
3. Remove the appropriate probe from the bracket. (See photo
Air Probe Evaporator
Probe
at left).
4. Remove the control box from the unit, following steps 2
through 5 in the Control Board Section.
5. Find the appropriate wires to the PC board and remove the
wires from the board.
6. Pull the probe wire through the wiring harness.
7. Install new probe in reverse order .
2-11. FRIGIPROBE1. Remove the electrical power to the unit.
T o avoid electrical shock or pr operty damage, move the
power switch to OFF and disconnect main cir cuit breaker ,
or unplug cord at wall receptacle.
2. Using a Phillips head screwdriver, remove the two screws
securing the evaporator door, and pull out on the door .
3. Remove the control box from the unit, following steps 2
through 5 in the Control Board Section.
4. Find the appropriate wires to the PC board and remove the
wires from the board.
Frigiprobe
5. Pull the probe wire through the wiring harness.
6. Install new probe in reverse order.
603 2-5
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