Troubleshooting – Flowserve MX Electronic Actuator User Manual
Page 86
Limitorque MX Electronic Actuator FCD LMENIM2306-06 – 10/13
86
5
Troubleshooting
c
WARNING: This actuator is non-intrusive. Do not open the control compartment on the actuator unless absolutely
necessary. It was sealed in dry, clean conditions in the factory and entry to this compartment should not be neces-
sary. Unauthorized entry could void the warranty.
If the actuator will not operate, before attempting to troubleshoot, verify the following:
• LCD display reads “XX% OPEN,” “STATUS OK.”
• Red selector switch is not in the STOP position.
• All three phases of the main power supply are present at the actuator terminals.
• The supply voltage is the same as that stated on the actuator nameplate.
• Optional 110 VAC is measured at terminals 23 and 24.
• 24 VDC is measured at terminals 22 (+Ve) and 21.
• If 24 VDC power supply is ON, check that the loading does not exceed 5 W across terminals 21 and 22 (remove wires
from 21, 22, 23, and 24).
• LCD and LED display on the control panel are illuminated.
If these checks are satisfactory, then attempt to locate the fault using the “VIEW DIAGNOSTICS” routine. It is also
recommended that the actuator settings be verified using “VIEW SETTINGS.”
5.1 View Diagnostics Routine
1. Enter “VIEW DIAGNOSTICS” as detailed in Section 5.3, View Diagnostics.
2. Review the various displays to try to find the reason the actuator will not operate. The displays that may help to
isolate the fault are as follows:
• View Hardware Status
• View Motor Status
• View Power Supply
5.2 Troubleshooting Problems/Corrective Action
(Refer to LMENIM2314, MX Maintenance and Spare Parts and the standard wiring diagram in the Section 3.3, Electrical
Connections). We recommend that only Limitorque service personnel perform this operation.
1. Switch off the main power supply and 24 VDC supply at terminals 6 and 7 (if used).
2. Remove control compartment cover (ACP) and protect against the ingress of moisture or dust.
3. Remove any wiring that has been connected to terminals 21, 22, 23 and 24.