Pneumatech HTM02-01, Руководство по эксплуатации и обслуживанию

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Installation, Operation and Maintenance Manual
Medical Vacuum Plant Page 55
After fixing the problem, the status should automatically reset. If it doesn’t, press “Local” in the
commands screen of the central controller and select ECO “Off” in the ECO menu (see Central
controller operation).
Then select On again and press Start in the commands menu. Alternatively, in the CAN menu,
press CAN Off and On.
3. Sensor error:
A problem with the pump’s local pressure sensor, cable or connections has occurred or the
pressure is out of range (e.g. -1,1 bar). Unless if the pump is in Local Off mode, this error will
always start the pump (Emergency Forced Local mode).
Taking into account the precautions of chapter Maintenance warnings, check the sensor, the
cable and the connections for proper connection and correct wiring according to the service
diagram. The fault should be physically remedied (spare parts can be ordered, consult the spare
parts list), whereby the alarm will automatically reset. If however the pressure is believed to be out
of range (pump runs in Emergency Forced
Local mode and plant inlet is closed or no vacuum demand), this error will reset automatically
once the pressure is in range again.
4. Failed To Go On Load (FTGOL):
Two situations can be discerned:
a. When the fault appears when the pump is running, two causes can lead to this fault:
• The switch, cable or connections lead to a short circuit. Taking into account the
precautions of chapter Maintenance warnings, check the sensor, the cable and
the connections for proper connection and correct wiring according to the service
diagram. The fault should be physically remedied (spare parts can be ordered,
consult the spare parts list), whereby the alarm will automatically reset.
• The pump does not succeed in producing a vacuum deeper than -380 mbar(e) (-
285 mmHg) within 10 seconds after the pump has been called (asked to run by
the controller). This means that the pump is most likely defect. Check that the
pump is rotating when called. If not, verify the electrical connections to the pump.
If the pump does rotate, flow demand may exceed the plant flow capacity, there
may be a leak or a blockage.
• b. When the fault appears when the pump isn’t running, following causes are
possible:
• • The switch, cable or connections are broken or loose. Check the sensor, the
cable and the connections for proper connection and correct wiring according to
the service diagram. The fault should be physically remedied (spare parts can be
ordered, consult the spare parts list), whereby the alarm will automatically reset.
• • The non-return valve, installed upstream of the FTGOL (Failed To Go On Load)
switch and pump inlet, is locked in open position. This could lead to oil being
sucked out from the pump into the piping and must be attended to as soon as
possible. Order a non-return valve service kit (consult the spare parts list) and
proceed to replacing the non-return valve according to chapter Non-return valve
and inlet screen replacement.
Table 8-12; Plant fault
Pump is called Pump is not called
<<0>> signal
received from
FTGOL switch
OK PLANT FAULT ALARM
- switch, cable or
connections disconnected
- non-return valve locked
open
<<1>> signal
received from
FTGOL switch
PLANT FAULT ALARM
- switch, cable or connections
short-circuited
- pump defect
OK