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PARTS
HEATER SYSTEM TROUBLESHOOTING
The wash tank heater system is electrically-connected in the circuit and is dependent upon the machine being properly
filled with water and maintaining a safe water level. The system consists of two thermostats (mounted in the heater box
behind the dress panel), a float switch (mounted in the wash tank), the heater relay (mounted in control box), and the
heater which is activated by the thermostats.
Once the dishmachine has filled to the correct level, the heater should operate automatically. Should the tank heat be too
high or too low or if there is no indication of temperatures at all, the following checks should be made by an authorized
service agent or electrician:
Heater System Check
1. If the temperature is too high, adjust thermostat using instructions on the next page.
2. If temperature is too low, adjust thermostat as above, then:
3. Turn off power to machine by placing customer's circuit breaker in the "OFF" position. Turn off machine circuit breaker
located on right side of control box.
4. Remove cover from control box on top of machine.
5. Make sure water temperature is below 140 °F (preferably about 130 °F).
6. Turn on both circuit breakers. Observe heater relay (R1) while the power switch is turned "ON" and "OFF."
If relay contacts move in and out, the heater relay is operating correctly. Based on results, follow the appropriate
section below (Relay Closes if contacts move in and out, Relay Does Not Close if contacts do not move in and out).
Relay Closes
1. Check power supply at incoming terminal board (L1, L2, L3). It should be the same voltage as indicated on
the machine data plate.
2. Check power at connections on heater relay (R1). The voltage should agree with the voltage on the
machine data plate. If not, check wires for breaks or bad connections.
3. Check power at terminals of heater, which should agree with the data plate. If not, check wires for breaks or
bad connections.
4. Temperatures should rise as explained in Step 1 of the Relay Does Not Close section below, and amperage can be
checked according to those instructions. Replace any defective elements.
Relay Does Not Close
1. There is an insulated movable bar on the relay across the top. With an insulated probe, depress this bar and observe
the thermometer: the temperature should rise noticeably in a minute or two. If it moves slowly, the element is probably
faulty. If it moves constantly higher at a good rate, the element should be good.
A check with an amp-probe at heater relay (R1) terminals should be made to verify the amp draw on each leg.
NOTICE
This should be appropriate for the voltage and phase indicated on the data plate.
07610-003-60-98-L
HEATER BOX
46
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