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COMPONENT OVERVIEW AND TROUBLESHOOTING
BEFORE SERVICING, UNPLUG UNIT.
USE EXTREME CAUTION WHEN SERVICING THE BASE COMPONENTS. THE EXTERNAL BODY
OF THE INLINE WATER HEATER WILL BECOME VERY HOT WHEN ENERGIZED. A LARGE
BARE CONDUCTOR IS EXPOSED ON THE BODY OF THE WATER HEATER, RUNNING DIAGO-
NALLY, FRONT TO BACK. THE CONDUCTOR IS “LIVE” WHEN THE PRODUCT IS PLUGGED IN.
DO NOT TOUCH.
Refer to Wiring Diagram for connector location and general information on component functionality.
Circulation Pump
The circulation pump is located in the base area. It is responsible for circulating large volumes of
water to turn the wash arms and feed the high powered spray jets that distribute water through the
tank. The circulation pump is controlled by power from the control board and power board. When
energized, power is sent through terminal P3 of the power board (120VAC measured between P3
and Neutral). If the pump fails to operate and power is present at P3, check the resistance of the
motor windings as follows: Main winding (Top/Mid; yellow and red leads) 0.7 ohms +/- 10% @ 70
deg F. Secondary winding (Top/Bottom; brown and red leads) 32.1 ohms +/- 10% @ 70 deg F. If
resistance does not fall within this range replace pump. Capacitor failure. If the above listed tests
do not locate fault, and the pump still fails to operate, then the capacitor may have failed. If this
condition is present you may hear a light humming noise created when the pump is attempting to
start. Check capacitor and verify correct wiring. Replace capacitor as needed.
Capacitor failure - If P3 energizes per the timing schedule yet the pump fails to operate and the
resistance values are met, the capacitor may have failed. A light humming noise will be audible.
The pump is attempting to start but the secondary windings are either not receiving energy or not
receiving enough energy. Check capacitor wiring. Retest. Replace capacitor if necessary.
Detergent Dispenser
The detergent dispenser is located in the door and is basically 3 components in one. The first func
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tion is to dispense detergent to the wash cycle. The second function is to dispense rinse aid to
the cycle. The final function this device serves is to sense the presence of rinse aid. This function
is accomplished by a float mechanism. The door has to be closed to get an accurate reading. The
detergent dispenser and the rinse aid dispenser are activated by the same circuit. The first time the
circuit is energized the detergent door swings open and streams of water from the upper spray arm
will rinse the detergent into the wash water. When de-energized the mechanism cycles so that the
next time the circuit is energized, the rinse aid will be dispensed.
The detergent dispenser is energized by the control board and the power board as necessary
(120VAC) through terminal P7 pin 4. This circuit operates a solenoid that creates the dispensing ac-
tion of both devices. In order for the mechanism to reset the dishwasher door must be fully opened
between washes. This allows a linkage bar to drop into position and resets the mechanism.
If the detergent door fails to open during the wash cycle, a solenoid failure may have occurred.
Check the resistance values of the solenoid at the connector. It should measure between 280 &
320 ohms. If these readings are present and the detergent door still fails to open, test by manually
engaging the solenoid and watching the soap dispenser door catch. It should rotate CCW roughly
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