Troubleshooting - Groen TDB Series Operator's Manual

TROUBLESHOOTING

This 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 found at the end of this manual. When in doubt, turn unit
off and call for service at 888-994-7636. If an item on the check list is marked
with (X), it means that the work should be done by an Authorized Service Agent.
SYMPTOM WHO
Display not lit User
(Advanced & C2T only)
Authorized
Service Rep
Only
PROB in display Authorized
Service Rep
(Advanced & C2T only)
Only
HI in display Authorized
Service Rep
(Advanced & C2T only)
Only
Kettle is hard to tilt Authorized
Service Rep
Only
Kettle will not heat, User
and heating indicator
will not come on
Authorized
Service Rep
Only
Kettle will not heat, Authorized
but heating indicator Service Rep
comes on Only
Kettle continues User
heating after it
reaches the desired
Authorized
temperature
Service Rep
Only
Kettle stops heating User
before it reaches the
desired temperature
Authorized
Service Rep
Only
Kettle heats slowly User
Authorized
Service Rep
Only
Pressure Relief Valve User
pops
Authorized
Service Rep
Only
CPER in display (C2T User
only)
Authorized
Service Rep
Only
10 OM-TDB (C,A,C2T™) & TDBC (C,A,C2T™) Domestic
WHAT TO CHECK
a. That power supply is on.
b. Fuses, accessible by removing caps on the side of
the control box.
c. For loose or broken wires. X
d. Temperature controller functioning, by listening
for a click when the switch opens or closes and
verifying LEDs on back of board. X
e. Contactor functioning. X
a. For loose or broken wires or damaged/failed RTD
probe. X
b. PCB board malfunction/failure
a. For loose or broken wires or damaged/failed RTD
probe. X
b. PCB board malfunction/failure
a. Gears for foreign materials, and lubrication. X
b. Gears for alignment. X
c. Worn gears or broken gears. X
a. Electric power supply to the unit. (Check the circuit
breaker.)
b. Water level in jacket.
c. Control circuit fuses. Replace a blown fuse only
with a fuse of the same AMP rating. X
d. For loose or broken wires. X
e. Tilt cut-off switch. X
f. That pressure switch is open. X
g. Operation of temperature control. X
h. Low water cutoff. X
a. Temperature control calibration and offsets. X
b. Heater elements with ohmmeter for ground short or
open element. If element is defective, call service. X
a. Control knob setting.
b. Temp control circuit for short. X
c. Temp control operation. The contacts should click
when the dial is rotated above and below the
setting for the temperature of the kettle. X
d. Contactor, to determine whether it is energized or
stuck. X
a. Control knob setting.
b. Temp control calibration and offsets. X
c. Temp control operation. The contacts should click
when the dial is rotated above and below the
setting for the temperature of the kettle. X
a. For air in the jacket. See "Jacket Vacuum" in the
"Maintenance" section of this manual.
b. Heater elements with ohmmeter for ground short
or open element. If an element is defective, call
service. X
c. Voltage of main power source. X
a. For air in the jacket. See "Jacket Vacuum" in the
"Maintenance" section of this manual.
b. Pressure switch setting. X
c. Temp control operation. The contacts should click
when the dial is rotated above and below the
setting for the temperature of the kettle. X
d. Pressure relief valve. If the valve pops at pressures
below 49 PSI, replace it.
e. ontactor, to determine whether it is energized. X
a. That core probe is plugged into the receptacle.
b. For loose or broken wires or damaged/failed RTD probe.
X
c. PCB board malfunction/failure. X