Equator EZ3720CEE Service Manual page 14

3) Pressure Switch (50774)
Replacement Procedure:
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Unplug the unit.
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Remove the top panel (Two screws behind and slide back)
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Unfix the screw to the pressure switch and replace the same.
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Fix all the parts back by following the reverse procedure.
Wiring: Pressure Switch – Back View
32 34 31 16 11 14 12
P1 P2 P3 P4 P5 P6 P7 P8 P9 P10
Testing Procedure:
▪
Cold Test:
1) Check for continuity between terminals 11 & 12, 21 & 22, 31 & 32.
2) If there is continuity between all the above stated terminals the pressure switch is good.
Please Note: The Pressure switch need to be checked with no water in the
unit.
22 24 21
14