Power Soak MX-220-HTS Owner's/Service Manual - Manual (Page 28)

27
Component Operation and Checks
Pump Contactor
The thermal overload can be checked as follows:
1. If there is 208-230v across the coil (terminals A1 and A2) and the contactor does
not pull in, the contactor is defective.
2. TURN POWER OFF AT BREAKER PANEL.
3. Remove the wires from terminals T1 and T3 on the thermal overload.
4. Push the contactor closed manually and check for continuity across pump contactor
terminals L1 and T1, L2 and T2, L3 and T3. If no continuity on any of these, the
contactor is defective.
Thermal Overload
The blue reset button should be in the down position (automatic reset). The dial should be
set at 10. The trip indicator is located between the dial and the symbols "LR2".
The thermal overload can be checked as follows:
1. TURN POWER OFF AT BREAKER PANEL. Remove the wires from terminals
95 and 96.
2. Make sure the thermal overload is not tripped. If the thermal overload is tripped,
reset it. If the thermal overload has tripped recently, you may have to wait several
minutes for it to cool down before it will reset.
3. Check for continuity across terminals 95 and 96. If no continuity, the thermal
overload is defective or the reset is tripped.
4. Make sure the T1, T2, and T3 terminals on the pump contactor are tight.
5. Remove the wires from terminal T1 and T3 on the thermal overload.
6. Check for continuity across T1 on the pump contactor and T1 on the overload, T2
on the pump contactor and T2 on the overload, T3 on the pump contactor and T3 on
the overload. If no continuity on any of these, the overload is defective.