MRP4 / MRP5 / MRP6
P. 7 / 8
EM-4824 Rev.7
MAINTENANCE
For effective use and longer life of the MRP, regular checking appropriate for its operating conditions are recommended. Refer
to the following table.
ITEM
CHECKING POINT
HOW TO PROCEED
Functioning
Apply input 0%, 50%, 100%, then back to 50%, 0%.
Check the actuator operations and positions at
each input value.
Repair or calibration
Abnormal sound
No abnormal sound is heard during operation.
Repair or calibration
Connector
Leadwire
The connector is firmly connected.
No breakdown of leadwires.
The insulation covers are not torn, not bruised.
Repair or calibration
Inside humidity, rust No condensation. No rust.
If there is water inside, check the packing.
Remove water, dry the case and inside parts.
Replace rusted parts. Calibration.
If the packing is damaged, replace it.
Screws
Check that screws and bolts are securely fastened. Re-tighten them.
For repair or parts replacement, contact M-System or representatives.
■
LUBRICATION
There is no need of oiling the MRP in normal operating conditions.
■
REGULAR TEST RUNNING
If the valve is not frequently operated, run a test operation regularly (once a week, for example) to check proper functions.
TROUBLESHOOTING
TROUBLE
POWER
LED
INPUT
LED
STATUS
LED
POSSIBLE CAUSE
HOW TO PROCEED
No
function
ON
ON
Flash
2 sec
Abnormal input signal.
(No change over deadband)
Check input signal.
Narrow the deadband.
ON
----
Flash
0.5 sec
Actuator mechanism is damaged.
Repair
Overload cause by a foreign object caught
in the valve.
Check the valve.
Control PCB damaged.
Repair or replace.
Wiring error at the motor or position sensor.
Check the connector.
Low power voltage or insufficient capacity. Check the power supply.
ON
OFF
Flash
2 sec
Abnormal input signal.
Check the input signal.
Wiring error at the input signal.
Check the connector and connecting section.
OFF
----
----
Wiring error at the power supply.
Check the connector and connecting section.
Abnormal power supply voltage.
Check the power supply.
Fuse melted.
Replace the fuse.
ON
----
ON
Malfunction by noise.
Turn off the power supply and restart.
Low power voltage or insufficient capacity. Check the power supply.
ON
----
OFF
Malfunction by noise.
Turn off the power supply and restart.
Low power voltage or insufficient capacity. Check the power supply.
Unstable functioning
Power voltage is low or fluctuating.
Check the power supply.
Unstable input signal.
Check the controller, cables. Eliminate
noise.
Position sensor damaged.
Replace the position sensor.
Stops in the middle of span
Slows down in the middle of span
Actuator mechanism is damaged.
Repair
Overload cause by a foreign object caught
in the valve.
Check the valve.
---- Regardless of LED state.
For repair or parts replacement, contact M-System or representatives.
Rugghölzli 2
CH - 5453 Busslingen
Tel. +41 (0)56 222 38 18
Fax +41 (0)56 222 10 12
www.sentronic.com
Produkte, Support und Service
SENTRONIC
AG
