Watlow Series V4T Instrukcja Użytkownika Pobierz pdf (Strona 18)

18 Watlow Series V4

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

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