I'm troubleshooting a VSD 503 with an alarm for high phase c instantaneous current. This alarm comes up when the chiller tries to start. I'm not familiar with york products, I'm looking for some info on where to look for troubleshooting tips. I've megged the motor, checked voltages, attempted to take amp readings during start up but I don't catch any readings. I swapped the current transformers and the problem follows the phase. I've checked my connections to the boards and motor terminals. I have noticed that while the chiller is idle, its reading 310 DC bus voltage (might be a separate issue). Thanks in advance
York- VSD- high phase c instantaneous current
S.villandry
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I'm troubleshooting a VSD 503 with an alarm for high phase c instantaneous current. This alarm comes up when the chiller tries to start. I'm not familiar with york products, I'm looking for some info on where to look for troubleshooting tips. I've megged the motor, checked voltages, attempted to take amp readings during start up but I don't catch any readings. I swapped the current transformers and the problem follows the phase. I've checked my connections to the boards and motor terminals. I have noticed that while the chiller is idle, its reading 310 DC bus voltage (might be a separate issue). Thanks in advance
Late to the game but hears a link to properly Meg test a motor.
https://docs.johnsoncontrols.com/chillers/api/khub/documents/wcgBZTjhXiXUwwH~P7dFMA/content
https://docs.johnsoncontrols.com/chillers/api/khub/documents/wcgBZTjhXiXUwwH~P7dFMA/content
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57 Posts
Dear Friends,
CHILLER YORK YK MODEL YKFDFSQ65CK6
FLA 474 AMPS
380 VAC, 50 HZ
VSD 419K-50
Before Problem :
1. the IGBT PHASE B - Blown Up (Broken BURNT OUT) - broke the blue capacitors also
After Repair :
1. Change all IGBT PHASE A,B, C
2. Change all CAPACITOR BLUE BUSS (8 units)
3. Change the Winding Motor Electric
Start the chiller , and the problems below occur :
1. Phase B , only 50 % from another PHASE A and PHASE C - (PHASE A - 541 AMPS,PHASE B - 200 AMPS, PHASE C - 541 AMPS,)
After that continue Repair :
1. Change the Winding Motor Electric
2. Change the VSD Logic Board New - With the OLD EPROM
Start the chiller , and the problems below occur :
1. the Motor Current Phase A ,B , and C - reached in 541 AMPS (in 23,5 HZ Command) - the chiller Safety shutdown - VSD - 105% MOTOR CURRENT OVERLOAD
please advice :
1. whether the problem in VSD Logic Board (Vyper KIT PN 331-02506-602 VYPER KIT) ? in command with the microboard YK ? since the VSD Start Freq to 30 HZ but in 23,5 HZ already overcurrent to the motor electric chiller YK
2. Other Software setting ?
thank you in advance
CHILLER YORK YK MODEL YKFDFSQ65CK6
FLA 474 AMPS
380 VAC, 50 HZ
VSD 419K-50
Before Problem :
1. the IGBT PHASE B - Blown Up (Broken BURNT OUT) - broke the blue capacitors also
After Repair :
1. Change all IGBT PHASE A,B, C
2. Change all CAPACITOR BLUE BUSS (8 units)
3. Change the Winding Motor Electric
Start the chiller , and the problems below occur :
1. Phase B , only 50 % from another PHASE A and PHASE C - (PHASE A - 541 AMPS,PHASE B - 200 AMPS, PHASE C - 541 AMPS,)
After that continue Repair :
1. Change the Winding Motor Electric
2. Change the VSD Logic Board New - With the OLD EPROM
Start the chiller , and the problems below occur :
1. the Motor Current Phase A ,B , and C - reached in 541 AMPS (in 23,5 HZ Command) - the chiller Safety shutdown - VSD - 105% MOTOR CURRENT OVERLOAD
please advice :
1. whether the problem in VSD Logic Board (Vyper KIT PN 331-02506-602 VYPER KIT) ? in command with the microboard YK ? since the VSD Start Freq to 30 HZ but in 23,5 HZ already overcurrent to the motor electric chiller YK
2. Other Software setting ?
thank you in advance
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thank you for the response
help greatly appreciated
========================
What is change winding motor electric.? --> just rewind the motor with new copper wire, since the WARNING - LOCKOUT PHASE C HIGH INSTANANEOUS CURRENT always occur
Did you re wind the compressor motor twice? --> just one
========================
help greatly appreciated
========================
What is change winding motor electric.? --> just rewind the motor with new copper wire, since the WARNING - LOCKOUT PHASE C HIGH INSTANANEOUS CURRENT always occur
Did you re wind the compressor motor twice? --> just one
========================
Ok so what kind of motor testing was done after the rewind?
TTR? Turns testing ratio.
Loop test?
RPM to Hz ratio test. With a separate VFD driver in the shop after rewind?
Not to be prying but dia of wire and Number of turn is important.
When tested what testing voltage and Hz was this done at.
The YK, was this made in the UK or Mexico?
What was the reason for the main failure to begin with.? Cooling system failure? Delaminating of the IGBT?
Did you change the main capacitor bus when you did your repairs?
TTR? Turns testing ratio.
Loop test?
RPM to Hz ratio test. With a separate VFD driver in the shop after rewind?
Not to be prying but dia of wire and Number of turn is important.
When tested what testing voltage and Hz was this done at.
The YK, was this made in the UK or Mexico?
What was the reason for the main failure to begin with.? Cooling system failure? Delaminating of the IGBT?
Did you change the main capacitor bus when you did your repairs?
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57 Posts
Ok so what kind of motor testing was done after the rewind? --> megger test , result perfect
TTR? Turns testing ratio.
Loop test?
RPM to Hz ratio test. With a separate VFD driver in the shop after rewind? --> the vsd drive in chiller , overdrive
Not to be prying but dia of wire and Number of turn is important.
When tested what testing voltage and Hz was this done at.
The YK, was this made in the UK or Mexico? --> made in china
What was the reason for the main failure to begin with.? Cooling system failure? Delaminating of the IGBT? --> IGBT Phase B - all burnt out , maybe cause dip in voltage drop in incoming power 380 vac,50 hz
Did you change the main capacitor bus when you did your repairs? --> yes ,all the buss capacitor, scr trigger board, igbt phase a,b,c
software issue and hardware issue VSD Logic board can make that overdrive problems ?
TTR? Turns testing ratio.
Loop test?
RPM to Hz ratio test. With a separate VFD driver in the shop after rewind? --> the vsd drive in chiller , overdrive
Not to be prying but dia of wire and Number of turn is important.
When tested what testing voltage and Hz was this done at.
The YK, was this made in the UK or Mexico? --> made in china
What was the reason for the main failure to begin with.? Cooling system failure? Delaminating of the IGBT? --> IGBT Phase B - all burnt out , maybe cause dip in voltage drop in incoming power 380 vac,50 hz
Did you change the main capacitor bus when you did your repairs? --> yes ,all the buss capacitor, scr trigger board, igbt phase a,b,c
software issue and hardware issue VSD Logic board can make that overdrive problems ?
Ok you need to rule out one thing at a time.
Can you send photo of the data plate of the motor it’s self.
If the phase of the motor is charged slightly this can be the issue as well. A meg test only shows insulation dielectric strength.
Other motor testing can be done to prove the motor. And was the motor wired properly.
Wye configuration versus a delta configuration. And the wound to the opposite of what was originally. Prove this first. Then work your way back.
Once hart is proven to work and Congo is correct. Then we work backwards..
Can you send photo of the data plate of the motor it’s self.
If the phase of the motor is charged slightly this can be the issue as well. A meg test only shows insulation dielectric strength.
Other motor testing can be done to prove the motor. And was the motor wired properly.
Wye configuration versus a delta configuration. And the wound to the opposite of what was originally. Prove this first. Then work your way back.
Once hart is proven to work and Congo is correct. Then we work backwards..
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57 Posts
Can you send photo of the data plate of the motor it’s self.
If the phase of the motor is charged slightly this can be the issue as well. A meg test only shows insulation dielectric strength.
Other motor testing can be done to prove the motor. And was the motor wired properly. --> the motor . there is no issues in the motor electri, because before rewind and rewinding, the same problem occur, which is phase imbalance , always phase c - lower 50 % compare to other phase A and Phase B, when chiller is starting up - we change the new logic board - the phase now phase a,b,c balance - but overdrive for example 30 hZ - must give the load AMPS 200 - 300 AMPS, but now 23 HZ Drive the Motor to 640 AMPS
Wye configuration versus a delta configuration. And the wound to the opposite of what was originally. Prove this first. Then work your way back.
If the phase of the motor is charged slightly this can be the issue as well. A meg test only shows insulation dielectric strength.
Other motor testing can be done to prove the motor. And was the motor wired properly. --> the motor . there is no issues in the motor electri, because before rewind and rewinding, the same problem occur, which is phase imbalance , always phase c - lower 50 % compare to other phase A and Phase B, when chiller is starting up - we change the new logic board - the phase now phase a,b,c balance - but overdrive for example 30 hZ - must give the load AMPS 200 - 300 AMPS, but now 23 HZ Drive the Motor to 640 AMPS
Wye configuration versus a delta configuration. And the wound to the opposite of what was originally. Prove this first. Then work your way back.
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57 Posts
to make sure there is no issue in motor Windings because the pysic of the windings not good - full of grease
If it passed a meg test then I would have just cleaned it. So how’s bearings?
Ok back to your problem.
The CT’s, do a experiment. Swap two. See if the issue transfers to another leg. Remember to switch the sensing lead as well.
But now you have lots of unknowns in your problem.
From all the parts changing. With out really knowing what was at fault.
If the problem stays.
I would put a 5 channel Oscilloscope on the motor section first to see the simulated sign wave. A battery operated one to keep the system ground out of the equation. Pay a company to do this if needed.
See if the results of the simulated sine is not the same, then it is the something with the drive. Back to the testing and make sure the IGBT are functioning. The capacitors are they all identical. With error percentage?
The fault could be the EPROM but to just change the part with out knowing the true cause will just lead to more guessing.
Best of luck.
Ok back to your problem.
The CT’s, do a experiment. Swap two. See if the issue transfers to another leg. Remember to switch the sensing lead as well.
But now you have lots of unknowns in your problem.
From all the parts changing. With out really knowing what was at fault.
If the problem stays.
I would put a 5 channel Oscilloscope on the motor section first to see the simulated sign wave. A battery operated one to keep the system ground out of the equation. Pay a company to do this if needed.
See if the results of the simulated sine is not the same, then it is the something with the drive. Back to the testing and make sure the IGBT are functioning. The capacitors are they all identical. With error percentage?
The fault could be the EPROM but to just change the part with out knowing the true cause will just lead to more guessing.
Best of luck.
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57 Posts
If it passed a meg test then I would have just cleaned it. So how’s bearings? --> NEW ONE
Ok back to your problem.
The CT’s, do a experiment. Swap two. See if the issue transfers to another leg. Remember to switch the sensing lead as well. --> no issue, already swap, when I swapped J8 J9 in VSD Logic board the error phase, swap to phase A , instead of phase B , follow with the swap
But now you have lots of unknowns in your problem.
From all the parts changing. With out really knowing what was at fault.
If the problem stays.
I would put a 5 channel Oscilloscope on the motor section first to see the simulated sign wave. A battery operated one to keep the system ground out of the equation. Pay a company to do this if needed.
See if the results of the simulated sine is not the same, then it is the something with the drive. Back to the testing and make sure the IGBT are functioning. The capacitors are they all identical. With error percentage? --> IGBT and capacitor , and scr diodes ,replace the new ones
The fault could be the EPROM but to just change the part with out knowing the true cause will just lead to more guessing. --> do you have any experience, when the software and the logic board error in comand IGBT to open or closing the gate driver - DC to AC current to the motor , because the vsd logic board error ,resulting overdrive for example 30 hZ - must give the load AMPS 200 - 300 AMPS, but now 23 HZ Drive the Motor to 640 AMPS
Best of luck.
Ok back to your problem.
The CT’s, do a experiment. Swap two. See if the issue transfers to another leg. Remember to switch the sensing lead as well. --> no issue, already swap, when I swapped J8 J9 in VSD Logic board the error phase, swap to phase A , instead of phase B , follow with the swap
But now you have lots of unknowns in your problem.
From all the parts changing. With out really knowing what was at fault.
If the problem stays.
I would put a 5 channel Oscilloscope on the motor section first to see the simulated sign wave. A battery operated one to keep the system ground out of the equation. Pay a company to do this if needed.
See if the results of the simulated sine is not the same, then it is the something with the drive. Back to the testing and make sure the IGBT are functioning. The capacitors are they all identical. With error percentage? --> IGBT and capacitor , and scr diodes ,replace the new ones
The fault could be the EPROM but to just change the part with out knowing the true cause will just lead to more guessing. --> do you have any experience, when the software and the logic board error in comand IGBT to open or closing the gate driver - DC to AC current to the motor , because the vsd logic board error ,resulting overdrive for example 30 hZ - must give the load AMPS 200 - 300 AMPS, but now 23 HZ Drive the Motor to 640 AMPS
Best of luck.
Darren, you have enough posts to apply for PRO membership. Do this, and have this thread moved to the closed forums.....this one will likely get shut down, due to the in depth technical troubleshooting. All this is allowed in the closed forums. PRO membership is free, all you need to do is apply.
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57 Posts
https://hvac-talk.com/vbb/threads/2...VSD-CHILLER-YORK-YK-OVERCURRENT-DRIVE-to-MOTOR-ELECTRIC?p=26278868#post26278868
I have just made a post in this room
I have just made a post in this room
That area is still in the public forums, not private, where in depth technical discussions can occur.....and you also joined another older thread for your new issues, which is generally look down on.
Apply for RPO status, and have the moderators merge both threads, and move them to the PRO chiller Forum.
The PRO forums can't be viewed, or even seen, without having PRO status.
Apply for RPO status, and have the moderators merge both threads, and move them to the PRO chiller Forum.
The PRO forums can't be viewed, or even seen, without having PRO status.
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57 Posts
please advice , IGBT as A second level of overcurrent current protection exists , it means the IGBT rather to burn out first ? as per motor winding failure ?
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