Watlow Series 734 Program - Manual (Page 14)

Alarms & Error Codes, Chapter 5 14
WATLOW Series 733/734 Program Manual
Error Codes Problem Probable Cause Solution
Er10 -
Stack overflow error
Er11 -
Zone 1 open sensor error
Er12 -
Zone 1 shorted sensor
Er13 -
Zone 2 Open sensor
Er14 -
Zone 2 shorted sensor
Er15 -
Zone 1 loop error
Er16 -
Zone 2 loop error
Microprocessor error
Open sensor
• Incorrect sensor type
• Measuring temperature
outside the sensor
range
Open sensor
• Incorrect sensor type
• Measuring temperature
outside the sensor
range
• Reversed sensor leads
• Faulty heater or gas
valve
• Shorted sensor
• Faulty output switching
device
• Blown fuse to heater
• Incorrect Pb1 value
for thermal system
See Er15 Probable
Cause above.
• Incorrect Pb2 value for
thermal system
• Cycle power
• Check the InP1 para-
meter. Verify it
matches your sensor.
• Check the InP1 para-
meter. Verify it
matches your sensor.
• Check the InP2 para-
meter. Verify it
matches your sensor.
• Check the InP2 para-
meter. Verify it
matches your sensor.
• Check heater or gas
valve
• Check sensor
• Check output switching
device
• Check fuse to heater
• Auto-tune the control
See Er15 Solution above.
• Auto-tune the control
˜
NOTE:
For Er10 through
Er14, first check
the sensor and
connections for a
reversed or open
sensor before
trying the solution
listed.
˜
NOTE:
Er06 through Er09,
and Er11 through
Er14 are self
clearing errors if
the condition that
caused the alarm
has been taken
care of.
Table 2 -
Continued
Error Code Actions
• Error codes will result in these conditons:
• The alarm outputs are in their alarm state (de-energized).
• The display alternately flashes the process value and error code.
• All keys are inactive except for the Temperature key . This key snoozes the
error code and display for 30 seconds.
• The above conditions occur regardless of the LOC value, or the presence of the
Setup, Service or Calibration Menus.
• To clear a corrected error…
• Cycle power to the control. OR
• Enter the Program mode by pressing the keys simultaneously for
3 seconds.
• Press the Menu 12 key 12 once.
• Press the Time key . The EC (Error Clear) prompt is displayed.
• Press the Temperature key , and the error is cleared. Press the Time key
twice, and you're back to the Operation mode [0)º0] .