Troubleshooting - ProMinent Makro TZ Operating Instructions Manual

ProMinent ®
12

Troubleshooting

WARNING
• EX pump only: Always observe the "Important supplements for dosing pumps in
EX areas" section of the "General Operating Instruction for ProMinent
Metering Pumps and Hydraulic Accessories"!
• Metering pumps and their peripherals must be maintained and repaired by qualified or
authorised personnel.
• For all dosing pumps for dosing flammable media, the following applies: start up and
draining only under specialist supervision.
• Always depressurise the suction and discharge lines before working on the pump!
• Always empty and rinse the liquid end before maintenance or repair work if the pump
has been used with unknown or hazardous media.
• Always wear suitable protective equipment to work on the liquid end when the pump has
been used with hazardous or unknown media.
• Ensure that the pump cannot be switched on by unauthorized personnel before working
on the motor.
Always disconnect external fan, actuator, speed controller or diaphragm rupture sensor
where present.
Check that the power is disconnected.
The pump does not prime despite full stroke action and bleeding
Cause: Valve dirty/worn
Remedy: Service valve (see "Repair" section)
Pump does not reach high pressure
Cause: Valve dirty/worn
Remedy: Service valve (see "Repair" section)
Cause: Motor connected incorrectly
Remedy: 1. Check voltage and frequency
2. Reconnect motor correctly
Cause: Power supply failure
Remedy: Remedy cause
Cause: Composite diaphragm ruptured without initiating alarm
Remedy: 1. Replace composite diaphragm without delay (see "Changing the diaphragm" in the
"Maintenance" section.)
2. TZMb only: change the separating diaphragm of the diaphragm rupture sensor if
necessary (see "Renewing the diaphragm rupture sensor separating diaphragm" in the
"Repair" section.)
Diaphragm rupture indicator gives alarm
Cause: Composite diaphragm ruptured
Remedy: 1. Replace composite diaphragm without delay (see "Changing the diaphragm" in the
"Maintenance" section.)
2. TZMb only: change the separating diaphragm of the diaphragm rupture sensor if
necessary (see "Renewing the diaphragm rupture sensor separating diaphragm" in the
"Repair" section.)
TZHa only: No hydraulic oil is flowing through the hose on the vent valve
Cause: ---
Remedy: Shut the pump down immediately and inform customer service!
Drive motor very hot
Cause: Discharge line severely constricted
Remedy: Remove restriction from discharge line
Troubleshooting
® Motor-Driven
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