** Fault Message **
SS01: Main Power F0105P1
Tranformer Oil Temperature or Presure Not Ok TE/BE Reduction or VCB trips try to close VCB if open.
Introduction (F0105P1):
The “F0105P1” alert signifies as abnormality in Tranformer Oil Temperature or Pressure, which will directly cause a Reduced TE/BE and VCB will trip. If VCB trips, try to close it again.
⚠️Effects of this fault are:
- Reduction in TE/BE
- GTO pulsing will stop
- Hotel load will off
- VCB will trip
💡Lamp Indication (F0105P1)
LSFI will start blinking & BPFA will glow.
❌Effect
Possibility of Reduced TE/BE, GTO pulsing will stop. Hotel load will off and VCB will trip.
🛠️Action to be taken by Loco Pilot
- “If TE is still available”, then try to clear the block section by Traction.
- “If VCB trips”:
- Immediately Bring the throttle to “0” position then Acknowledge fault by pressing “BPFA” button.
- After that Try to Close “VCB” and try to clear the block section by coasting.
- “If VCB trips”:
- ✅Check Transformer Oil Pump (TFP):
- Manually feel the “inlet/outlet pipes” of under the frame for vibrations/warmth. which indicate the is working.
- ✅Check MCB’s in cubicles:
- MCB 62.1/1 in HB-1
- MCB 62.1/2 in HB-2
- ❌If found tripped,
- then open VCB and reset MCB once.
- ✅If MPH not working:
- Then Switch OFF and ON MCE.
- Keep loco in idle mode for 10 minutes.

- ✅Ensure Transformer Oil Level:
- Check/ensure the oil level in both the “expansion tanks” of transformer in Machine Room and Oil level should always be “between the Max. & Min Mark”.
- ✅Check working of (OCB) Oil Cooler Blower in the machine room then
- If OCB is not working then CHECK/ensure that
- MCB 59.1/1 in HB-1
- MCB 59.1/2 in HB-2
- If found tripped:
- Then Open VCB & Reset MCB only once.
- If OCB’s are still not working,
- Then Switch OFF and ON MCE.

- If OCB impeller and its casing got physically damaged:
- Then Isolate Damaged OCB:
- Open MCB 59.1/1 (HB-1) or 59.1/2 (HB-2)
- Open Concerned SR Oil pump MCB 63.1/1 (HB-1) or 63.1/2 (HB-2)
- Open concerned TFP ( Transformer oil pump) MCB 62.1/1 (HB-1) or 62.1/2 (HB-2)
- Then Isolate Damaged OCB:
- ⚠️Operate all above MCB “after opening VCB and switching OFF MCE”.
- Then isolate concerned Bogie-by-Bogie using “isolating switch (154)” located in SB-1 .
- then Switch ON MCE ➡️ Raise panto ➡️ close VCB.
- after that Work the train with one Bogie after informing TLC.

** ⚠️Fault Message **
SS01: Main Power F0105P1
Main Power Isolated VCB Inhibited loco is dead
💡Indication Lamp
LSDJ & LSFI will glow
❌Effect
VCB will not close
🛠️Action to be taken by Loco Pilot:
- If the same message repeats and MCB’s are normal:
- Then Bring throttle to “0” position.
- After that Switch OFF and ON MCE once again.
- Then Raise panto ➡️Close VCB ➡️ Resume traction.
- If not successful:
- Check “DDS Message”:
- SLG1:0019 🔜Isolate SR-1
- SLG2:0019 🔜 Isolate SR-2
- if not successful within 20 minutes, ask for relief loco.
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