Watlow MICRODIN Manuel d'utilisateur télécharger pdf (Page 19)

19 Watlow MicroDIN Quick Start Guide

Indication Symptoms Probable Cause(s)

Troubleshooting Alarms and Errorsmost likely problems are listed first

Power

• No power. • Power supply switch off

• Fuse blown

• Breaker tripped

Error = off • Safety interlock door switch, etc.

• Separate system limit control may be latched

(Normal = • Open wiring

steady green) • Power ≤ 20V‡ (ac/dc)

Communications

• Unit will not communicate. • MicroDIN address DIP switch incorrectly set

• MicroDIN baud rate DIP switch incorrectly set

• MicroDIN unit-to-unit daisy chain disconnected

• Reversed, short or open EIA-485 communications wiring

Error = off • EIA-485 converter box incorrectly wired

• Computer COM port incorrectly set up

(Normal = • Communications software setup or address incorrect

pulsing green) • Protocol or parity wrong, not 8, n, 1

• Needs termination and pull-up and pull-down resistors

Input Error

• Input is in error condition. • The sensor is improperly wired

• Sensor wiring reversed, shorted or open

• MicroDIN firmware setting does not = actual sensor

• Power ≤ 20V‡ (ac/dc)

Error = steady red • Ambient environmental temperature out of spec for MicroDIN

• The MicroDIN open loop detect shows a broken sensor

(Normal = off ) • The calibration offset parameter is set much too high or low

Alarms

• Alarm won’t occur. • Alarm output off

• Alarm set points incorrect

• Alarm silenced

• Alarm sides incorrect

Alarm = steady red • In diagnostics mode

• Alarm won’t clear. • Alarm latched

(Normal = off) • Alarm set points incorrect

• Alarm hysteresis incorrect

• Input in error condition

Errors

Flashing LED Error 4

•

RAM malfunction

Indicator Light Error 5

•

EEPROM data corrupted

Pattern Error 6

•

PROM malfunction

Error 7

•

Logic hardware problem

Error 11

•

New firmware installed

Error 12

•

Calibration data corrupted

Error 13

•

Analog-to-digital hardware failure

Error 14

•

EEPROM hardware problem

Error 15

•

New unit first power up

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Watlow MICRODIN Manuel d'utilisateur Page 19

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