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MKV <I> "BATTERY 125 V DC GROUND" alarm.
(L64D_P = 1, causing L64D =1)
Battery Charger is also indicating a ground.
MKV DIAGC - TCQA Voltages:
P125v = -1.42 Vdc
N125v = 129.14Vdc
We pulled and replaced isolation jumpers (5 each, JB1 - JB5) from following cards:
CD_DTBA
CD_DTBB
QD1_DTBA
QD1_DTBB
QD2_DTBA
QD2_DTBB
also
Cycled power to <R>, <S>, <T>, <X>, <Y> & <Z>
...could not isolate ground.
Shut down MKV completely by opening the DC breaker to MKV panel. The ground alarm did clear on the battery charger but came back in as soon as the DC breaker was re-closed.
Any suggestion of where to look next would be greatly appreciated.
(L64D_P = 1, causing L64D =1)
Battery Charger is also indicating a ground.
MKV DIAGC - TCQA Voltages:
P125v = -1.42 Vdc
N125v = 129.14Vdc
We pulled and replaced isolation jumpers (5 each, JB1 - JB5) from following cards:
CD_DTBA
CD_DTBB
QD1_DTBA
QD1_DTBB
QD2_DTBA
QD2_DTBB
also
Cycled power to <R>, <S>, <T>, <X>, <Y> & <Z>
...could not isolate ground.
Shut down MKV completely by opening the DC breaker to MKV panel. The ground alarm did clear on the battery charger but came back in as soon as the DC breaker was re-closed.
Any suggestion of where to look next would be greatly appreciated.