Effective November 2013 Supersedes May 2012

Technical Data AP02405001E

Troubleshooting flow charts CM-52

Fail to Close

Is the MPCV Red LED (Closed) ON?

No

External Handle in AUTO?

No

IDM “Spring Release” LED ON?

No

C

IDM “Motor Enable” LED ON?

No

Place Handle in AUTO

Yes

Door Interlock in Proper Position?

B

A

Yes No

No

IDM “Motor OK” LED ON?

Pull Door Interlock Rod

Replace IDM or IDM-ARMs Module

Yes Are Umbilical Test Leads Installed Properly?

No

Voltage is not Sufficient for Closing or Poor Ground Connections

Install Correctly Retest

Yes

No

Is IDM “Power On Indicator” LED ON?

Check IDM Voltage, Should be 125 Vac Between IDM Pins J1-7 to J1-1 and J1-7 to J1-8

Retest

Yes

No Is Pin A14 in Disconnect Fully Inserted? No Reinsert Pin or Replace as Necessary

Figure 1. Fail to Close

Yes

Is Control Power Fuse Blown?

No

Inspect for Damaged Wiring and Replace Fuse

Yes Retest

Yes

Technical Data AP02405001E

Troubleshooting flow charts  

Effective November 2013

A

Solid Yellow Float LED ON?

No

Flashing Float Light?

Yes

Yes

Relay in Programming Mode, Reinsert Programming Tool and Save Setting

Retest

Check the Following: 1) Incorrect Rotation Set in Relay 2) Test Set Phasing Leads Crossed 3) Test Set Power Leads Crossed 4) Potential Voltage Missing

Check Potentials at Test Phasing Block for Missing Phase (Blown Fuse or Continuity) Crossed or Rolled; All Six Should be 125 Vac Nominal to Ground

No

Does not Meet MPCV Set Point Criteria; Increase Phasing Voltage Value on Test Set to Meet MPCV ML Setting

Green Trip LED ON Solid?

Retest

MPCV Relay Failure LED ON?

Yes

No

Yes Replace Relay

No

Retest Yes

Power at Relay

No

Figure 2. Solid Yellow Float LED ON

2

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Check for Damaged Wiring and Repair

Check Potentials at Relay: (All Should be 125V) Points 5–6 = VNA Points 5–7 = VTA Points 5–18 = VNB Points 5–17 = VTB Points 5–13 = VNC Points 5–12 = VTC

Technical Data AP02405001E

Troubleshooting flow charts  

Effective November 2013

B

Is Wiring to Motor OK?

Wire M1 to G1 Should be 125 Vac When MPCV Calls for a Close-Springs Will NOT be Charged

Yes

Replace Motor

Checked OK

No

Check BF1 Close Relay

Repair or Replace Wiring

Wires CL4 to Ground Should be 125V Before BF1 is Energized Wires CLS to Ground Should be 125V After BF1 is Energized

You Can Disconnect CL4 and CL5 from BF1 and then Energize BF1 and Check Continuity Across BF1

Replace BF1

Figure 3. Is Wiring to Motor OK?

C

Is Wiring to Spring Release OK?

No

Repair or Replace Wiring

Yes

Is there 125 Vac Between Wires CL6 and G1?

Replace Spring Release

No

Are the Springs Charged?

Charge Springs No

Retest

Yes

Is the LS2 Switch Closed?

No

Replace LS2 Check Shutter

Figure 4. Is Wiring to Spring Release OK?

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3

Technical Data AP02405001E

Troubleshooting flow charts  

Effective November 2013

Fail to Trip

Is MPCV Relay Failure LED ON?

Yes

Replace Relay

No

Is IDM “Trip Actuator OK” LED ON?

No

Troubleshoot Trip Circuit (Check Voltage at IDM, J1-4 to J1-5 Should be 125 Vdc)

Yes

Is there 125 Vac at #1 Point on MPCV Relay?

No

Check Fuses in Lower Relay Drawer and Check Wiring

Yes

Check Trip Circuit (TR1 and TR2 Aux Contacts)

Yes

Is MPCV Calling for a Trip at Correct Trip Current?

No

Check Trip Actuator and/or Wiring

Verify Test Set is Putting Out Current on All Three Phases

Figure 5. Fail to Trip

4

EATON www.eaton.com

Technical Data AP02405001E

Troubleshooting flow charts  

Effective November 2013

Remote racking

1

NOTE: Breaker MUST be OPEN and the manual protector handle in the OPEN position for remote racking operation. NOTE: The 5/16 Allen adapter must be used for cranking manually from the TEST position to the DISCONNECTED position and from the DISCONNECTED position to the TEST position. You will need to push in to disengage the clutch; make sure you re-engage the clutch after you reach the TEST position.

Re-Learn Sequence 1) Remove the black cap on the top left-hand side of the R/R unit

NOTE: The manual crank is not designed to be used from the TEST position to the CONNECT position. Remote Racking Operation

2

Operates Incorrectly

No

Racks in but Racks Back Out then POWER ON Flashes Repeatedly 3X

Unit was Manually Operated and is Out of Sequence

A

Does Not Operate (Top Three LEDs Powered)

Does Not Operate (No LEDs ON)

Yes

Is the Protector OPEN?

Is Handle in OPEN Position? Yes

Unit Needs to be Re-Learned

Unit Needs to be Re-Learned

No

Is 120 Vac at Remote Racking TB Positions Across Points #1 and #2?

1

LED Light?

Yes

Check 10A Fuse and Power Source Continuity

Check Wiring/ Connections

Recheck Operation

Yes Is Fuse Blown?

Inspect Wiring/ Connections

No

A Testing the Breaker Interlock: With the breaker OPEN, handle in OPEN with Rem Rack powered, the POWER ON and breaker at TEST LEDs will be illuminated. Close the breaker and the Rem Rack LEDs must go out, verifying the "b" contact wiring.

3) R/R is ready for use. Press IN to go from TEST to CONNECT and OUT to go from CONNECT to TEST for operation verification.

No

Yes

1

Place Handle in OPEN Position

2) Press the Learn button inside and release; the R/R will make two revolutions CCW then start turning CW until it reaches the CONNECT position (Red). The Learn LED will flash and start turning CCW. Once the TEST position window (Yellow) becomes full, you must manually press the Learn button again. This will complete the learning process.

LEDs ON

No

Repair Wiring Connections

Replace Fuse

Yes Check Wiring/ Connections

Check Wiring/ Connections

Note: Test Set may be needed to close the breaker if you have pushbutton interlock covers. Testing the Handle Interlock: With the breaker OPEN, handle in OPEN with Rem Rack powered, the POWER ON and breaker at TEST LEDs will be illuminated. Move the handle to the AUTO position; the LEDs on the Rem Rack must go out, verifying the "b" contact on the handle.

Figure 6. Remote Racking Operation

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5

Technical Data AP02405001E

Troubleshooting flow charts  

Effective November 2013

NPARMS

ARMS Activation

Yes

Is Blue LED Lit?

Test Using ARMS Tester

Communication Is Communication System OK?

Activated By?

Is NPARMS Address Correct?

Yes

No Repair Communication System

Pendant Control Is Power Source Available? No

Check Operation of AAR Relay Coil and AAR Contact (13, 13A)

No Correct NPARMS Address

Is 13 and 13A Connected to COM and N/O Contacts?

Yes

Is 120 Vac for AAR Coil/Control Available?

IDM LEDs ON? No

Check Communication Wiring/ Connections and Repair

Yes

No Check 120 Vac Source and Wiring

Check CPT Fuses; Replace as Necessary

Yes

Does Control Operate AAR Coil? No

Is Wiring Between Control and Coil OK?

Yes Yes Does AAR Contact Change State? No

No

Yes

Is Wiring and Connections OK?

No

Yes Replace NPARMS IDM

Replace AAR Relay

Yes

Recheck Operation

Replace AAR Relay

Repair Wiring/ Connections

Repair Wiring/ Connections

Figure 7. ARMS Activation

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