Troubleshooting – Watlow Series 365 User Manual
Page 13
WATLOW Series 365 User’s Manual
13
Troubleshooting
Problem
Probable Cause
Action
Poor temperature
The proportional band is not
Adjust the proportional band per Tuning.
control.
adjusted properly.
The load will
1. An open sensor.
Repair or replace.
not turn ON.
2. The load circuit is open.
Check the fuses, circuit breakers, load,
and wiring. See Output Wiring, Page 8.
3. The AC input is not connected
Check the AC input connections. If not
or is connected improperly.
present or proper, connect per Power
Wiring. See Page 6.
4. A faulty unit.
Contact the factory.
The load will
1. The polarity is reversed on the T/C.
Connect per Input Wiring. See Page 7.
not turn OFF.
2. A faulty unit.
Remove power to the control and the
control from the system. Apply power to
the system with the control removed. If the
load turns OFF, return the control to the
factory. If the load remains ON, there are
other problems in the system that must be
resolved. Consult the factory.
The unit is not con-
The unit is out of calibration.
Refer to the calibration procedure which
trolling to set point.