Welbilt FB081TF, Service Manual

Page: 78 / 96

78 Part Number REV00 04/08/2020
Component Check Procedures Section 7
DUCT FAN MOTOR
Location
Top of the base cabinet below the duct opening.
Function
Moves cool air from the cabinet through the tubing chase
to maintain cabinet temperature in the beverage lines.
Specifications
24 VDC 2.4 watt
Check Procedure
1. Check wiring connections on SRB terminal J36.
2. Isolate by disconnecting the wiring connectors.
3. Check continuity across the terminals with an ohm
meter.
• Resistance of 17MΩ±10% = Motor is good.
• Open (OL) = Replace motor.
4. Check rotor for excessive play or binding.
CONDENSER FAN MOTOR
Location
At the rear of the base unit, behind the panels on the
condensing unit.
Function
Moves air through the condenser to condense refrigerant
from vapor to liquid state.
Specification
230 VAC 9 watts
Check Procedure
1. Isolate by disconnecting the main power supply.
2. Check that the fan blade is secured to the motor.
3. Check the blade spins freely.
4. Check rotor for excessive play or binding.
5. Remove the wiring from the terminal connectors and
check continuity across the terminals with an ohm
meter.
• Resistance = Motor windings are good.
• Open (OL) = Replace motor.
Refrigerant Recovery/Evacuation
SELF-CONTAINED MODEL PROCEDURE
Do not purge refrigerant to the atmosphere. Capture
refrigerant using recovery equipment. Follow the
manufacturer’s recommendations.
Important
Multiplex assumes no responsibility for the use
of contaminated refrigerant. Damage resulting
from the use of contaminated refrigerant is the
sole responsibility of the servicing company.
Important
Replace the liquid line drier after recovering
the refrigerant and before evacuating and
recharging. Use only a Multiplex (OEM) liquid
line filter-drier to prevent voiding the warranty.
Connections
Manifold gauge sets must utilize low loss fittings to comply
with U.S. Government rules and regulations.
Make these connections:
• Suction side of the compressor through the suction
service valve.
• Discharge side of the compressor through the discharge
service valve.