Watlow Electric Micro-Based Autotuning Control SERIES 980/985 - Manual (Page 33)

Er 1, 2, 3 & 7 Errors - Control Outputs May Be ON
If operator access is LOC 0 or
1 . . .
. ..and the control was in AUTO operation when the error occurred, it will
go into MANUAL (% power) operation. If the output power is less than
70%±5% change within the last two minutes, the 985 will switch into
Manual operation at the last Automatic power level. If the control was in
MANUAL operation, it will remain there. (You must press the AUTO/
MAN key twice to see the error code.) The alarm output (if present) will
be in its alarm state (LED lit). The Upper display will read “- - -“. The
Lower display will indicate the error code.
If the control was operating with stable output values when the error
occurred, it will continue to operate at those levels on a % power basis.
If output values were not stable, the control outputs will go to 0% power
(OFF).
.
If operator access is LOC 2 or 3. . .
The control will remain in AUTO operation. The control outputs will go
OFF. The AUTO/MAN and MODE keys are disabled. The UP/DOWN
keys may be used together to enter the Set Up Menu. The alarm output
(if present) will be in its alarm state (LED lit). The Upper display will read
”
- - -“. The Lower display will indicate the error code.
l
To clear a corrected error...
l
Cycle power to the control.
Er 4 & 5 Errors - Control Outputs Will Be OFF
Error codes Er 4 and Er 5 will result in these conditions:
The control is in AUTO operation with both Outputs OFF.
The alarm output (Output 2), if present, is in its alarm state (de-ener-
gized with the LED lit).
The Upper display will indicate the process value#.
The Lower display will indicate the error code.
All Keys are inactive.
All Set Up Menu parameters are reset to default values. Calibration
values 4AO and 2AO are set to default values. All other Calibration
Menu values remain unchanged.
These conditions will occur regardless of the value of LOC, or the pres-
ence of the Set Up or Calibration Menus.
To clear a corrected error. . .
l
Cycle power to the control.
l
Recalibrate the 4-20mA output, if applicable (see the unit’s model #).
Tuning and Operating, Chapter 5 WATLOW Series 9801985 User’s Manual 33