Operating guide | MPE 70
22
180R9426 | AQ367027814446en-000801 | IOM MPE 70 | 08.2022
10.1 Safety regulations
The operator ensures that all inspec-
tion and installation work is performed
by authorised, qualified specialist
personnel who are thoroughly familiar
with the manual.
Before intervening in the MPE 70/
system:
•
The power must be shut off and
the starting device be locked.
•
The pressure in the high-pressure
lines must be drained to low-
pressure side.
•
The water in all connected pipes
must be drained.
The numbers in () correspond to the preferred system design and P&ID (see data sheet)
Problem
Possible cause
Action
VFD cannot start the MPE 70 at initial start-up
VFD is not designed for constant torque.
Choose a VFD that is designed for constant
torque
VFD cannot deliver sufficient start torque/current
Choose a VFD that is designed for sufficient
start torque.
Ramp-up settings in the VFD are not correct. VFD
is tilting
Set ramp-up parameters correct.
Torque on MPE 70 is too high during
operation
Debris in the MPE 70
Clean the system
Wear in the MPE 70
Repair or change the parts
Permeate production is too low (17)
Valves (6), (7), (8) or (16) are leaking
Repair or change valve(s)
Internal leakage in MPE 70
If the HP pump is working OK identify which
MPE 70 is causing
the leak by measurring the housing pressure
of each individual MPE 70
Check the HP pump and repair if necessary
Pressure on the membranes (5) is too high
Fouling on the membranes
Clean the membranes
Mixing in the MPE 70 is too high
Check flow on LP-in (12)adjust it with the flow
in pos. (29)
Flow out of the MPE 70 is too low and causes a
recovery rate that is too high
Check the flowmeter pos (29) and adjust
booster pump pos (30) accordingly
Pressure on the membranes (5) is too low
Valves (6), (7), (8) or (16) are leaking
Repair or change valve (s)
Internal leakage in MPE 70
Repair MPE 70
Check the HP pump and repair, if necessary
10. Trouble-shooting
Summary of Contents for MPE 70
Page 25: ...Data sheet Energy Recovery Device MPE 70 hpp danfoss com...
Page 53: ...Parts list Energy recovery device MPE 70 hpp danfoss com...
Page 58: ...Danfoss DCS im 2022 08 AX367028596447en 000301 58...
Page 59: ...M a n u a l Electric Motors Motor Manual hoyermotors com...
Page 63: ...63 180R9426 AQ367027814446en 000801 IOM MPE 70 08 2022...