
SuperNova PD500 PID Process & Temperature Controllers
Instruction Manual
52
Troubleshooting Tips
Symptom
Check/Action
No display at all
Check power at power terminals.
The MV display is blank.
The controller is in STOP mode. Change it to RUN mode by
holding the shift key for 2 seconds.
The control outputs are not working.
Verify the controller is not in STOP mode. Change it to RUN mode
by holding the shift key for 2 seconds.
Verify the controller is not in manual mode. If in manual mode, the
MANU indicator will display on the controller. Hold the SET and
down keys for 3 seconds to change from manual to automatic
mode.
The controller displays LOCK in the SV
window when attempting to change the SV or
menu parameters.
The controller settings lock is enabled. Hold the SET and shift
keys for 3 seconds to turn the lock off. Consider turning the lock
back on when changes are competed.
The control outputs are not changing and
the MANU light is on the display
The controller is in manual mode. Change the controller to
automatic mode by holding the SET and down keys for three
seconds.
The controller is in heating and cooling mode
and only heating or cooling mode is needed.
To operate as a heating or cooling controller, disable the Output
Group (G.OUT) parameter CNT2. Set CNT2 to NONE. This will
disable the heating and cooling output indication of H or C before
the MV % output display digits.
After setting CNT2 to NONE, set the Group (G.OUT) parameter
O.ACT to reverse acting (REV) for heating control, or direct acting
(DIR) for cooling control.
The MV display shows a H or C when heating
and cooling mode is not required.
Other symptoms not described above
Call Technical Support for assistance.
Note: Certain sequences of events can cause unexpected results. To solve these issues, it is best to start fresh from
factory defaults and use the manual as a step-by-step programming guide, rather than a random approach to
programming. To reset the controller to factory defaults, use the Parameter Initialization (P.INT) parameter in the
Settings Group (G.SET).
In addition, for best results, we recommend using the free SuperNova TCS software to review all of the controller
settings.