535-PROF User's Manual
Appendix 3
A-5
Troubleshooting
Entering the Set Up mode and changing a
parameter will clear the message. If due to
something other than the user purposely
clearing the memory, call factory for assis-
tance.
Problem should never happen. Must correct
the situation and recalibrate. Call factory for
assistance.
May not need to do anything. May want to
check the transmitter accuracy and check to
see if range of transmitter matches the range
of the controller.
Check wiring and sensor/transmitter.
Check wiring and remote setpoint source.
Check communications wiring, etc. To clear
message, must make an auto/manual change.
This is a fatal error and requires an EPROM
change. Call factory for assistance.
Must power down and install correct module
combination or must reconfigure the controller
to match the current module combination.
Check the slidewire wiring.
Call factory for assistance.
This is a fatal error and requires an EEPROM
change. Call factory for assistance.
Enter calibration menu and recalibrate the
controller. Call factory for assistance.
This is a fatal error and requires an EPROM or
EEPROM change. Call factory for assistance.
Install the 535 chassis into the actual case
with which it was shipped, then run calibration
again. If further problems, call factory for
assistance.
Whenever the memory is cleared and all
parameters revert to factory default settings.
This may be done by purposely clearing the
memory or when the unit is powered up for the
first time or if the software version is changed.
Indicates that the calibration data has been
lost. Occurs if all the memory has been
erased.
When the process variable value travels
slightly outside the boundaries of the instru-
ment span. Does not apply to thermocouple or
RTD inputs.
When the controller senses a lost process
variable signal or the input signal travels well
beyond the instrument span.
When the remote setpoint is in use and the
controller senses that the signal has been lost
or has travelled well outside the range.
When the communications is lost for longer
than the communications shed time.
On power up a problem with the EPROM is
detected. Controller locks up until fixed.
Upon power up, controller senses that the
modules needed for control as determined by
software configuration are not present.
The slidewire feedback is sensed as lost.
The cold junction is sensed as lost.
During power up an EEPROM failure is
detected. Controller locks up until fixed.
When the controller is powered up with default
calibration data (input and output accuracy
specifications may not be met).
During power up, a discrepancy was found
between the EEPROM's and controller's
model numbers. Controller locks up until fixed.
During cold junction calibration, a discrepancy
was found between the controller type and the
case type.
DEFAULTS
LOST CAL. or
ERROR: BAD CAL. DATA
PV1 UNDER or
PV1 OVER or
PV2 UNDER or
PV2 OVER or
LOST PV1 or
LOST PV2
LOST RSP
COMM SHED
ERROR: ROM CHECKSUM
OUT1 CONF or
OUT2 CONF
LOST F/B
LOST CJC
ERROR: BAD EEPROM
NEEDS CAL.
ERROR: BAD MODEL NUM.
CAL.ERROR
SEE.MANUAL
Message
When does it occur?
What to do:
