Emerson Damcos - Troubleshooting Guide

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Damcos LPU: Troubleshooting Guide LPU Service Manual

February 2017 SM 8000-100-01 Ed 04

43

Troubleshooting Guide LPU

This Chapter Describes how to Identify

and Correct minor Problems for LPU

Table of Contents

Table of Contents3
February 2017 SM 8000-100-01 Ed4
Table of Contents6
Abbreviation and Denomination7
Safety9
- Warning Levels Used in Manuals10
General Service Instructions for LPU13
- General Considerations14
- LPU and Optional Equipment16
LPU-S Overview19
- Overview LPU-S20
LPU-S-Ex Overview23
- Overview LPU-S-Ex24
LPU-S-Ex-Ia Overview27
- Overview LPU-S-Ex-Ia28
LPU-D Overview31
- Overview LPU-D32
LPU-D-Ex Overview35
- Overview LPU-D-Ex36
LPU-D-Ex-Ia Overview39
- Overview LPU-D-Ex-Ia40
Troubleshooting Guide LPU43
- Fault Finding List LPU45
- LPU-S Frequently Restarting in Open Position47
- Motor Not Running and Is Hot49
- Motor Not Running and Is Cold49
- Motor Not Stopping50
- Pump Rendering too Low (or No) Pressure in One or both Directions51
- Solenoid Valve Not Working52
- Actuator Only Running in One Direction53
- (The Unit Can Either Only Open or Only Close)53
- Actuator Only Running in One Direction (the Unit Can Either Only Open or Only Close)53
- Noise from Pump, but Only at Low Pressure54
- Noise from Pump, but Only at High Pressure55
- Noise from Pump at both High and Low Pressure55
- Motor Running Hot, LPU Is Operating Normally56
- LPU-D Not Maintaining Pressure on Actuator57
- Spring Actuator Only Partly Closing or Not Starting to Close58
- Emergency Operation by Key Giving Oil Spillage through Breather Valve59
- Emergency Operation by Key Not Possible, Hydraulically Locked59
- Emergency Operation by Hand Pump Giving Oil Spillage through Breather Valve59
- Emergency Operation59
- Emergency Operation by Hand Pump Not Possible60
- Pump Not Rendering Sufficient Oil at High Pressure ("Valve Running too Slowly")61
- Motor Running for a Short Time and Stops62
- High Pressure on the Port to Which Oil Is Led62
- Motor Running for a Short Time and Stops High Pressure on the Port to Which Oil Is Led62
- Motor "Diving" in RPM in End Position63
- Motor "Diving" in RPM as Spring Actuator Opens63
- Oil Spillage, Generally64
- Oil in Electronic Connection Box64
- Oil Spillage from Breather Valve64
- Unit Drawing too Much Current65
- Too Little Tank Volume for Operating Actuator66
- LPU Cannot Raise Pressure after Hand Pump Operation (but no Problems after Remote Operation)67
- LPU Leaking from Bleeder Valve When Hand Pump Is Mounted68
- Spring Actuator Do Not Close by Emergency Hand Pump Operation69
- LPU-Ex Motor Do Not Run70
- Tuator71
- LPU-Ex Has to be Bulkhead Mounted Because of too Little Space or Zone 0 at Actuator71
- Position Indicator Errors72
Operating LPU-S 273
Operating LPU-D 2A75
Emergency Operation of LPU V.277
Speed Adjustment for Actuator on LPU (V.2)83
Pump Pressure Adjustment for LPU85
Refill of Oil in LPU87
Replace Pump in LPU93
Replace DPCV in LPU97
Replace Release Valve in LPU99
Setup New P-Net LPU Circuit Board101
Setup New P-Net LPU Circuit Board in VIEW Ver. 3.16103
Replace Printed Circuit Board105
Replace Solenoid Valve in LPU-D107
Replace Pressure Switch109
LPU Technical Data111
- Technical Data113
LPU Power Control System119
- LPU Power Control Description121
- Operation LPU-S123
- Operating LPU-D124
- LPU with LED Position Indicator125
LPU P-NET System129
- LPU P-Net Description131
- PCB Diagram for Local Control132
- PCB Diagram for Stand Alone Unit133
Hydraulic Hand Pump135
- Technical Data137
- Hydraulic Diagram for Direct Mounted LPU Handpump138
- Hydraulic Diagram for Bulkhead Mounted LPU Handpump139
Index141

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