ELGi EG 22 - 6.2 Troubleshooting

6.13
Maintenance
Troubleshooting 6.2
This guide lists the most likely indications with possible causes. For any problem, follow the diagnosis in sequential order as
mentioned in the following charts. Before doing any work in the compressor, be sure that electrical supply has been cut off
and the entire compressor is depressurized.
Problem Cause Solution (go sequentially)
Compressor not
starting
Power supply not available Restore incoming power supply
Incoming voltage is below limit
(1) Correct the incoming voltage.
(2) Ensure isolator is within 5m (16 ft) from the compressor.
(3) Ensure sufficient power back up
(4) Select and use the correct cable size.
Emergency stop switch in pushed Rotate counter clockwise direction and release
Emergency stop switch malfunction
Clean or replace the emergency switch.
Tighten the wires at terminals
Isolator fuse blown.
(1) Select correct fuse rating from selection chart.
(2) Check and correct the short circuit within the control
panel.
(3) Dedicated isolator to be provided to the compressor.
(4) Check and correct the motor winding/ body short after
Incoming phase-to-phase voltage
imbalance of more than 5V
Correct incoming voltage.
Adjust main incoming transformer tapping.
Correct the power factor to less than unity.
Incoming phase to earth voltage Correct the incoming voltage.
Control MCB malfunction Replace MCB
Control fuses inside compressor
control panel blown
Check for any short circuit or loose connection.
Replace the solenoid valve / control transformer if defective.
Replace the glass fuse (2A for Neuron, 1A for the control
circuit).
Control transformer fuse blown
Replace the control transformer if defective.
Replace glass fuse (0.25A for Neuron, 0.5A for the control
circuit).
No power supply to Neuron
controller.
(1) Replace control transformer fuses.
(2) Ensure tight connection of the 24V power supply connector
(3) Replace control transformer (50VA).
No display in Neuron controller
(1) Replace the control transformer (50VA).
(2) Replace the control fuse.
(3) If 24V power supply to Neuron is okay then replace with
anew Neuron micro controller.