Watlow Series 988LF Manual de usuario descargar pdf (Pagina 52)

7.6 WATLOW Series 988LF Users Manual Tuning, Manual Operation, Alarms, and Error Codes, Chapter 7

Error Codes

NOTE:

An alarm display will be

masked by an error

condition or when the

control is in the Calibra-

tion or Setup menus.

The ambient temperature of the Series 988LF has dropped below 32°F/0°C

or risen above 149°F/65°C. Calibration errors can also cause this error

code. Try setting [`rSt] (Calibration Menu) to [`yES].

[`Er4]: RAM verification error

An internal RAM failure has occurred. Contact the factory.

[`Er5]: Non-volatile checksum error

An EEPROM checksum error was detected. Turn the power off then back

on again. If this does not clear the error, contact the factory.

[OPLP]: Open-loop detect

This error is not available while in the on/off mode. It is only active when

[OPLP] is set to [``On] (Diagnostics Menu).

[`Er9

]]

]: Configuration error

An incorrect module has been installed in the control. Contact the factory.

Error Code Actions

• All of the above error codes except [`Er4], [`Er5] and [`Er9] will

result in this condition:

• If the control was operating with stable output values (less than

75% power and less than a 5% changeover the past 2 minutes)

when the error occurred, it continues to operate at those levels on a

percent-power basis ([bplS]). If output values were not stable, or

the percent output was greater than 75%, the control outputs drop

to 0% power (off).

• To clear an error code…

• If [`Err] is set to [`nLA], the error code should clear once the

problem is corrected.

• If [`Err] is set to [`LAt], correct the problem and cycle power. You

can also clear the error by pressing both the Up-arrow > and

Down-arrow < keys to enter the Setup Menu, then press the

Display key ¥.

• Error codes [`Er4], [`Er5] and [`Er9] will result in these conditions:

• The control is in automatic operation with both control outputs off.

• The alarm outputs are in their alarm state (de-energized with the

LED lit).

• The lower display is blank.

• The upper display indicates the error code.

• All keys are inactive.

• With [`Er5], all Setup Menu prompts return to default values.

Cycle power to the control. If the error is still present contact the factory.

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