Power Soak MX-220-HTS Owner's/Service Manual - Manual (Page 25)

24
Component Operation and Checks
The following checks should only be performed by qualified
technicians using extreme caution.
Electrical hazard to untrained personnel may result in electrical
shock, burns, or death.
Heater Contactor
If there is 208v-230v across the coil and the contactor does not pull in, the contactor is
defective. If there is 208v-230v across terminals L1 and L2 and the contactor is pulled in,
but no voltage across terminals T1 and T2, the contactor is defective.
Heater Element
Check the heat element as follows:
1. TURN POWER OFF AT BREAKER PANEL.
2. Make sure the connections at terminals T1 and T2 on the heater contactor are tight
and the heater contactor is open.
3. Check the resistance between terminals T1 and T2 on the heater contactor.
Resistance should be 21 to 24 ohms. If not, the heat element is defective. If there is
no resistance, check the wiring connections in the heater box before assuming the
element is defective.
4. If there is no water in wash sink, fill until heat element is completely submerged.
5. Set test meter to read resistance and check for resistance between terminals T1 on
the heater contactor and ground and T2 on the heater contactor and ground. If there
is measured resistance to ground, the heat element is defective.
Heater ON/OFF Selector Switch
TURN POWER OFF AT BREAKER PANEL. In the "off" position, there should be no
continuity across terminals 3 and 4. In the "on" position, there should be continuity
between terminals 3 and 4. Remove the wires before checking for continuity.
Push ON / Push OFF Start and Stop Buttons
TURN POWER OFF AT BREAKER PANEL. The stop button should have continuity at
rest and no continuity when pushed in. The start button should have no continuity at rest
and continuity when pushed in. Remove the wires before checking for continuity.