Watlow Series V4T - Manual (Page 18)

1 8 Wa t l o w S e r i e s V 4
Troubleshooting Alarms and Errors
Indication Probable Cause(s) Corrective Action
Error Code Messages ([----] in the upper display indicates a Series V4 error; error code number is visible in
bottom display)
• Sensor input generated a value lower than allowable
signal range, or A/D circuitry malfunctioned. Enter a
valid input. Make sure [``In] parameter (Setup
Menu) matches your sensor and DIP switches are set
accordingly.
• Microprocessor is faulty; consult factory.
• Unless power interruption occurred while controller
was storing data, nonvolatile memory is bad; consult
factory.
• A/D circuit is underrange. Check sensor; if function-
ing properly, consult factory. Make sure [``In]
parameter (Setup Menu) matches your sensor and
DIP switches are set accordingly.
• A/D circuit is overrange. Check sensor; if functioning
properly, consult factory. Make sure [``In] parame-
ter (Setup Menu) matches your sensor and DIP
switches are set accordingly.
• Sensor underrange error (applies
only to RTD units)
• Configuration error.
• Non-volatile checksum error.
• A/D underflow error.
• A/D overflow error.
• [----] [`Er2]
• [----] [`Er4]
• [----] [`Er5]
• [----] [`Er6]
• [----] [`Er7]
• Check the alarm logic for compatibility with system
peripherals and annunciators.
• Check the power limit setting
• Check the operation mode.
• Check the alarm output function.
• Check the °C or °F setting.
• Check the calibration offset value; set it to a lower
level.
• Alarm may be latched.
• Alarm set points may be incorrect..
• Alarm hysteresis may be incorrect.
• Input may be in error condition.
• Alarm won’t
occur.
• Configure output as an alarm.
• Check alarm set points.
• To clear the alarm, correct the alarm condition; check
to see if the alarm is latched.
• Check the alarm sides setting.
• Check the alarm type setting.
• Alarm output may be off.
• Alarm set points may be incorrect.
• Alarm may be silenced.
• Alarm sides may be incorrect.
• Controller may be in diagnostics
mode.
• Alarm won’t
occur.
Alarms
• Check switches, fuses, breakers, interlocks, limits,
connectors, etc. for energized condition and proper
connection.
• Measure power upstream for required level. Check part
number for input power required.
• Check wire size.
• Check for bad connections.
• Power to unit may be off.
• Fuse may be blown.
• Breaker may be tripped.
• Safety interlock door switch, etc.
may be activated.
• Separate system limit control
may be latched.
• Wiring may be open.
• Input Power may be incorrect.
• No power. Power