72
VIII.
VIII.
Troubleshooting
Troubleshooting
Circulation Pump
Circulation Pump
-
-
Checking PTC Pump Motor Starter (2)
Checking PTC Pump Motor Starter (2)
3
2
41
Apexx
model
shown
TECH TIPS: Resistance
measurements:
Between terminals 1 - 2 is ~
7 Ω (one of the main run
windings).
Won’t help between
terminals 2 - 4 (start
winding, a run winding & the
motor starter). The motor
starter can’t be measured
since the windings are
always connected. Must
disconnect PTC 1st to
measure its continuity.
PTC
NOTE: Apexx (SH_99)
models shown. Wire
colors will change for
other models.
Terminal located
on motor starter
.
Terminal located on motor
.
2
24
1
3
NOTE: Unlike standard two-winding pump
motors, these three-winding pump motors
have four terminals instead of three.
NOTE: Motor terminals 2 -
3 and one of the PTC
terminals are tied together.
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