Troubleshooting - Groen TDH 24C Operator's Manual

Your kettle 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 and in this manual. If an item on the list is followed
by X, the work should be done by a qualified service representative.
BEFORE REPLACING ANY PARTS, DISCONNECT THE UNIT FROM THE ELECTRIC POWER SUPPLY
USING REPLACEMENT PARTS OTHER THAN THOSE SUPPLIED BY THE MANUFACTURER OR AN AUTHORIZED
DISTRIBUTOR CAN CAUSE OPERATOR INJURY AND EQUIPMENT DAMAGE AND WILL VOID ALL WARRANTIES.
SYMPTOM
Display not lit
(Advanced only)
PROB in display
(Advanced only)
HI in display
(Advanced only)
Kettle is hard to tilt
Kettle continues heating
after it reaches desired
temperature
Kettle stops heating before it
reaches the desired
temperature
Safety Valve pops open
Burners will not light
System does not produce a
spark
18 OM-TDH/TDHC
AND CLOSE THE MAIN GAS VALVE. ALLOW FIVE MINUTES FOR UNBURNED GAS TO VENT.
WHO
User
Auth Service
Rep Only
Auth Service
Rep Only
Auth Service
Rep Only
User
Auth Service
Rep Only
User
Auth Service
Rep Only
User
Auth Service
Rep Only
User
Auth Service
Rep Only
User
Auth Service
Rep Only
Auth Service
Rep Only

Troubleshooting

WARNING
X indicates items which must be performed by an authorized technician.
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.
b. Gears for alignment. X
c. Worm gears or broken gears. X
a. Temperature controller dial setting.
b. Temperature controller calibration and offsets.X
c. Controller operation. The Controller relay should click when the dial is
rotated to settings above and below the temperature of the kettle.X
a. Temperature controller dial setting.
b. Temperature controller calibration and offsets.X
c. Controller operation. The Controller relay should click when the dial is
rotated to settings above and below the temperature of the kettle.X
a. For air in the jacket. See "Jacket Vacuum" in the Maintenance section
b. Thermostat dial setting.
c. For defective controller. The temperature controller should click when
the dial is rotated to settings above and below the temperature of the
kettle. If defective, replace.X
d. For defective safety valve. If the valve pops at pressures below 49 PSI,
replace.X
a. That the main gas supply valve is open. (handle is in line with gas pipe).
b. Gas supply to the building.
c. That the kettle body is not tilted.
d. Temperature controller operation. The thermostat should click when the
dial is rotated to settings above and below the temperature of the kettle.X
e. That tilt limit switch is closed when body is not tilted.X
a. AC voltage between terminals on secondary side of transformer. If it is
not 24 Volt, replace the transformer. X
b. That the high tension cable is firmly attached and in good condition. If
cracked or brittle, replace.X
c. Pilot electric ceramic for crack or break.X
d. Pilot spark gap. Regap.X
WHAT TO CHECK