Product Manual

6.8
Maintenance
Troubleshooting 6.2
This guide includes the most likely problems with possible causes. In case of a problem, follow the diagnosis in sequential
order as mentioned in the following charts. Before performing any work in this unit, be sure to cut off electrical supply,
depressurize the entire compressor, and isolate the unit.
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 the isolator is within 5m from the compressor.
(3) Ensure sufficient power backup.
(4) Select and use the correct cable size.
Emergency stop switch in pushed
condition
Rotate counterclockwise and release.
Emergency stop switch malfunction
Clean or replace the emergency switch.
Tighten the wires at terminals.
Isolator fuse blown
(1) Select the correct fuse rating from the 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 the
megger test.
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
imbalance of more than 5V
Correct 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 the 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
to Neuron.
(3) Replace the 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 a
new Neuron micro controller.