Watlow Electric 986 User Manual
WATLOW Series 988 User’s Manual
7.9
Tuning, Manual Operation, Alarms and Error Codes, Chapter 7
Error Codes
[`Er3]: Ambient temperature error
The ambient temperature of the Series 988 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]. (Read about
Factory Calibration in Chapter 6.)
The ambient temperature of the Series 988 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]. (Read about
Factory Calibration in Chapter 6.)
[`Er4]: RAM verification error
An internal RAM failure has occurred. Contact the factory.
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.
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).
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.
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 these conditions:
• If
[FAIL]
is set to
[bPLS]
(Global Menu)…
…and the control was in automatic operation when the error
occurred, it goes into manual (% power) operation. If the output power
is less than 75% (± 5%) power and there was a change in power (< 5%)
within the last two minutes, the Series 988 switches to manual opera-
tion at the last automatic power level (bumpless transfer). If the con-
trol was in manual operation, it remains there. (Press the Auto/Man
key å once to see the error code.) The error code is shown in the
upper display for five seconds and the lower display shows the %
power. After five seconds the upper display reverts to the [----] dis-
play.
occurred, it goes into manual (% power) operation. If the output power
is less than 75% (± 5%) power and there was a change in power (< 5%)
within the last two minutes, the Series 988 switches to manual opera-
tion at the last automatic power level (bumpless transfer). If the con-
trol was in manual operation, it remains there. (Press the Auto/Man
key å once to see the error code.) The error code is shown in the
upper display for five seconds and the lower display shows the %
power. After five seconds the upper display reverts to the [----] dis-
play.
• If the control was operating with stable output values when the error
occurred, it continues to operate at those levels on a percent-power
basis.
basis.
• If output values were not stable, or the percent output was greater
than 75%, the control outputs drop to 0% power (off).
• If [FAIL] is not set to [bPLS]…
… and the control was in automatic operation when the error
occurred, it goes into manual (% power) operation. The power level is
determined by the [FAIL] prompt value ([`=00] to [`100] percent).
occurred, it goes into manual (% power) operation. The power level is
determined by the [FAIL] prompt value ([`=00] to [`100] percent).
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