Dover Unified Brands Groen TDB-20 C TA/2 Manuale dell'operatore - Pagina 10
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Your unit is designed to operate smoothly and efficiently if properly maintained. However, the following is a list of checks to make
in the event of a problem. Wiring diagrams are furnished inside the service panel. X indicates items which must be performed by
an authorized technician. USE OF ANY REPLACEMENT PARTS OTHER THAN THOSE SUPPLIED BY UNIFIED BRANDS OR THEIR
AUTHORIZED DISTRIBUTORS CAN CAUSE INJURY TO THE OPERATOR AND DAMAGE TO THE EQUIPMENT AND WILL VOID ALL
WARRANTIES.
SYMPTOM
Motor will not run.
Motor runs at high speed
only without control.
Motor runs at low speed
only.
Motor speed varies rapidly.
Motor overheats and/or
sparks excessively.
Fuse blows frequently.
SCRs or diodes have short
lives.
Troubleshooting guidance for the kettle component of your cooker/mixer is contained in the separate kettle manual.
10
OM-TDB-20/40, TA/2
WHO
User
a. Power supply to the unit.
b. Fuse in the control console.
c. For a mechanical overload.
Authorized
d. For a defect in the power module. Check SCRs and diodes.
Service Rep Only
e. Regulator.
f. For loss of reference voltage. Check speed adjustment pot and wiring.
Check maximum speed pot. X
g. Motor brushes for wear or sticking. X
h. That the tilt switch is closed. X
i. For a ground or short in the motor. X
Authorized
a. Speed adjustment pot or wiring. X
Service Rep Only
b. Power module. X
c. Regulator. X
User
a. For a mechanical overload.
Authorized
b. Speed adjustment pot or wiring. X
Service Rep Only
c. Motor brushes for wear or improper seating. X
d. Regulator X
e. For open motor field circuit, by checking field current. X
Authorized
a. For an oscillating load, by disconnecting the mixer drive from the agitators
Service Rep Only
and checking motor speed. X
b. Motor brushes for wear, improper seating, or sticking in holders. X
c. I.R. drop compensation, and adjust if set too high. X
d. SCRs. X
e. I.R. drop compensation pot. X
f. Dirty or defective regulator. X
g. Control panel and motor for a ground. X
User
a. For an overload.
Authorized
b. Motor brushes for wear or improper seating. X
Service Rep Only
c. Grade of brushes used. X
User
a. For an overload.
Authorized
b. For incorrect jumper horsepower. X
Service Rep Only
c. Power module. X
d. Regulator. X
e. Whether line voltage is too high. X
f. Motor armature and wiring for ground or short. X
g. For open motor field circuit, by checking field current. X
Authorized
a. For constant overload, peak overload, or excessive starting load. X
Service Rep Only
b. Panel for overheating, because ambient temperature is too high or
ventilation is obstructed. X
c. Line voltage. X
d. Motor or wiring for a ground. X
Troubleshooting
WHAT TO CHECK