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#30475 - 01/13/21 02:21 AM T4 Stopping in flight  
Joined: Apr 2018
Posts: 1
Dpless95 Offline
Helper
Dpless95  Offline
Helper

Joined: Apr 2018
Posts: 1
Dover T4 (duplex 5 stops) trapping people intermittently, takes about 2 hours of running to warm up and create faults. 54, 56 and 628 faults. Car tries to run 3 times then needs a TFR
I have changed
1. MC and BK contractors along with their Aux.
2. C1 contactor and Aux. (below drive main contactor)
3. Changed BKO, BKI, BK2, BK3, MCI, GL, WDPF, GL, DRDY, DE Modules
4. All of the 120v ice cube relays above brake relays.

No clue where to go with this car has been off line for 2 months now. Customer getting frustrated as well as me.

Attached Files
Last edited by Dpless95; 01/13/21 02:22 AM.
#30476 - 01/13/21 02:57 AM Re: T4 Stopping in flight [Re: Dpless95]  
Joined: Dec 2018
Posts: 3
Master of none Offline
stranger
Master of none  Offline
stranger

Joined: Dec 2018
Posts: 3
Had this same issue last week. Ended up being a bad IGBT. Make sure to use the heat sink compound when you replace it

Last edited by Master of none; 01/13/21 02:59 AM.
#30479 - 01/13/21 01:23 PM Re: T4 Stopping in flight [Re: Dpless95]  
Joined: Aug 2014
Posts: 5
ray oyler Offline
stranger
ray oyler  Offline
stranger

Joined: Aug 2014
Posts: 5
Try replacing velocity encoder.

#30489 - 01/14/21 12:14 PM Re: T4 Stopping in flight [Re: Dpless95]  
Joined: Feb 2012
Posts: 82
NY Guy Offline
journeyman
NY Guy  Offline
journeyman

Joined: Feb 2012
Posts: 82
Looks like these faults are leaning towards losing one of the power supplies that feed the drive. Check all the power supplies on the rear of the controller for voltage and AC noise. Most likely your problem.

Good luck!

#30494 - 01/15/21 01:28 AM Re: T4 Stopping in flight [Re: Dpless95]  
Joined: Dec 2015
Posts: 1,529
Indirtwetrust Offline
ElevatorPractitioner
Indirtwetrust  Offline
ElevatorPractitioner

Joined: Dec 2015
Posts: 1,529
Local 18
Looks like the 628 is the cause. I’ve never seen that one before though. How much AC voltage do you read in the bus? Could be the +/- 15v power supply, digital current regulator card, ribbon cable between DSP and current reg.

#30498 - 01/15/21 10:36 PM Re: T4 Stopping in flight [Re: Dpless95]  
Joined: Jun 2017
Posts: 93
boomer Offline
journeyman
boomer  Offline
journeyman

Joined: Jun 2017
Posts: 93
Check the bus voltage and check it for ac could be a bad cap bank

#30597 - 02/14/21 02:31 AM Re: T4 Stopping in flight [Re: Dpless95]  
Joined: May 2011
Posts: 487
E-man Offline
addict
E-man  Offline
addict

Joined: May 2011
Posts: 487
Jump the phase monitor and see if it goes away.

#30598 - 02/14/21 06:04 AM Re: T4 Stopping in flight [Re: Dpless95]  
Joined: Apr 2014
Posts: 263
heisenberg Offline
Engineer
heisenberg  Offline
Engineer

Joined: Apr 2014
Posts: 263
Did you replace the relay holders as well?

#30599 - 02/14/21 07:43 AM Re: T4 Stopping in flight [Re: Dpless95]  
Joined: Jan 2014
Posts: 736
Rolly Offline
old hand
Rolly  Offline
old hand

Joined: Jan 2014
Posts: 736
Change the DE Module...

#30637 - 02/21/21 04:10 AM Re: T4 Stopping in flight [Re: Dpless95]  
Joined: May 2015
Posts: 71
TC7 Offline
journeyman
TC7  Offline
journeyman

Joined: May 2015
Posts: 71
I agree with jumping out voltage monitor especially if it is one of the orange ones. Possibly this is emergency stop from CPU shutting off very briefly. TKE had a bulletin to tap on the side of it with screwdriver handle to check for flaky internal connections/contacts. These have caused a great deal of aggravation. If that is your problem then replace the component. Also make sure you have good suppressors around contractor coils.


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