MicroCool RHINO 15, Installation & Maintenance Manual

Page: 23 / 38

Master Rhino Manual_
March 2020.docx
March 20 Page 23 of 38
11. TROUBLE SHOOTING
PUMP MODULE HAS STOPPED RUNNING
Pump system has faulted out due to loss in supply water pressure or VFD fault. Pump will try re-start in 30
seconds. If the water pressure has not been restored, or the VFD fault automatically re-set, the pump system will
remain off for another 30 seconds. After the second 30 second interval the pump system will again try to re-start.
If the water pressure has been restored or VFD was able to automatically re-set, the fault will clear and system will
return to normal operation. If the fault(s) has not been cleared, the pump system will lock-out and the LCD Display
will indicate the Fault.
INLET WATER PRESSURE FAULT:
Water supply to pump module may be inadequate. Check the following:
•
Inlet water pressure has dropped below 20 P.S.I. (1.4 BAR)(correct water pressure)
•
Dirty filter elements (inspect and replace if necessary)
• Water supply turned off (make sure it is on)
• Restriction in water line to pump (look for partially closed valve or other device)
•
Other lines drawing water off line feeding pump module (the line should feed only the module).
VARIABLE FREQUENCY DRIVE (VFD) FAULT CODES
For more detailed descriptions reference WEG manual.
DRIVE
DISPLAY
DESCRIPTION POSSIBLE CAUSES
F0021
Undervoltage fault on the intermediate circuit.
•
Wrong voltage supply; check if the
data on the inverter label complies with
the power supply and parameter
PO296.
•
Supply voltage too low, producing
voltage on the DC link below the
minimum value (in P0004):
Ud<200 Vdc in 200-240 Vac (P0296=0).
Ud<360 Vdc in 380-480 Vac (P0296=1).
Ud<500 Vdc in 500-600 Vac (P0296=2).
•
Phase fault in the input.
• Fault in the pre-charge circuit.