Other Problems; Pump Controller Communications - Edwards GXS Series Instruction Manual

This translates to:
alarm 1 in bit 2 ‑ PWM_TRIP
alarm 8 in bit 4 ‑ OVERT
warning 2 in bit 6 - HIGHTM.
This means the motor is overheated and switched the output off.

10.5 Other problems

10.5.1 Pump controller communications

The pump controller contains two processors that perform different functions. Under
normal operation, the two processors communicate with each other internally while
they perform their functions.
Under fault conditions, it is possible that the two processors stop communicating with
each other. In this circumstance:
▪ The pump may continue to run normally, with gas valves and gate valves kept in
the same state.
▪ Depending which device is 'in control' of the system, control might be released (for
example PDT).
▪ The front panel controls can be used to 'take control' and stop the pump but this
will only be a simple stop, it will not be possible to use any of the shutdown
sequences such as Smart Stop.
▪ If the front panel controls or the EMS button are used to stop the pump, the
warning LEDs on the pump will flash and the alarm LED will illuminate. The inlet
isolation valve will shut.
▪ Stop requests from all the devices apart from the front panel controls will be
ignored.
▪ Any requests to start the pump will be rejected.
For systems fitted with the MCM MicroTIM:
▪ If the pump is stopped when communication is lost then 'alarm present' is set on
the alarm line.
▪ If the pump is running when communication is lost then the outputs to the
MicroTIM are unaffected.
M58800880_H - Fault finding
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