71
VIII.
VIII.
Troubleshooting
Troubleshooting
Circulation Pump
Circulation Pump
-
-
Checking PTC Pump Motor Starter (1)
Checking PTC Pump Motor Starter (1)
The (PTC) circulation pump motor starter (#
182318
) is used on
SHX99B
/ SHV99A / SHY99A
(“Apexx”),
&
SHX56B / SHV66A / SHY56A-66C
(“ExactWash”)
models with water switches. The matching circulation
pump (#
239129
) has three slightly smaller & more efficient windings
compared to the traditional pump with two larger windings (#
266511
motor / #
239144
pump). The 3rd (start) winding is cut out when the
motor gets running. This stronger pump is needed due to the increased
water flow resistance from the water switch.
3 2 4
1
HINT:
PTC (motor
starter) is located on top
of the pump motor and
can face one of two
directions -- facing out or
facing over the motor.
To install (PTC) motor starters,
push female terminals over pump
motor terminals 2 & 4. The
terminals are different sizes to
match the smaller motor terminal 4.
The (PTC) motor starter helps start the circulation pump. It’s a ceramic thermal
switch which conducts current & heats up, cutting out the 3rd (start) winding at a
preset temperature. The two main windings (with the start/run capacitor) have
power whenever the pump is running.
Check the motor starter if the pump motor won’t start (starter stuck open) or
runs hot (starter stuck closed).
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