Pneumatech HTM02-01, Operation And Maintenance Manual

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Installation, Operation and Maintenance Manual
Page 52 Medical Vacuum Plant
If a red LED is lit on a pump controller, the corresponding problem should occur both on the pump
overview screen and on the main display of the pump controller, where it should appear as a
blinking icon (see Interface icons and menu structure):
1. a. Slave switched to Local:
Check if the Emergency Forced Local symbol and red LED are present on the pump controller
(see Interface icons and menu structure).
If so, a fault may have occurred whereby the system itself did not sustain the vacuum at the
required minimum.
Emergency Forced Local will start every pump (that is not in Local Stopped status) automatically
based on only one input: the pump’s local pressure transducer sensing a pressure less deep than
-590 mbar(e). Please contact your customer contact.
Once the cause is fixed, and pressure is deeper than -590 mbar(e), the user can only reset the
warning by pressing the Escape button, otherwise the pump will run infinitely in this safety mode.
If the Local/LAN switch is set to Local and there is no reason for it, please switch it back to LAN
control. This is not a fault as such but constitutes a situation which is sub-optimal (the central
controller can’t control the pump to ensure even wear or respond to the demand based on
pressure difference per unit of time).
b. No answer:
Interrelated with the previous fault, sometimes the Emergency Forced Local fault can cause the
central controller (Purelogic) not to find the pump controller.
After resetting the Emergency Forced Local as described above, also the following procedure
must be carried out (full access needs to be obtained, see Central controller operation): go to
submenu Commands and press Reset.
Figure 8-35; Controller alarms and faults – Pumps commands
2. No Communication:
Either the controller has no electrical supply or there is a CAN network error.
Taking into account the precautions of chapter Maintenance warnings, check that the controller is
adequately electrically supplied and fix if necessary. If supply is adequate, check the software
CAN settings in both the pump controllers and the central controller (see previous chapters).
Verify that the CAN cables at the backside of the cubicles are correctly connected to the other
cubicles. If so, open the cubicle and verify that the CAN cable is correctly connected between the
cubicle back plate and the controller. If that is the case, open the CAN connectors and verify that
the wires are correctly connected. Contact Pneumatech MGS for further investigation.