Teledyne 701 Manuel D’Utilisation

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01671H (DCN6051) 
7-1 
7 TROUBLESHOOTING 
This section presents possible problems and their causes and solutions. 
Problem 
Probable Cause 
Corrective Action 
Unplugged power cord. 
Plug in power cord at both 
ends. 
Incorrect line voltage. 
Refer to Table 3-1 for the 
correct line voltage. 
Tripped power switch/circuit 
breaker. 
Untrip power switch/circuit 
breaker. 
Power light does not come 
on. 
VDC power supply failed. 
Replace power supply. 
Tank pressure is above the 
cut-out pressure. 
No action. Pressure will 
drop as air is used. 
AIR IN filter is plugged. 
Replace the filter. 
Compressor fan is jammed. 
Check for any mechanical 
obstruction. 
Pump is not connected to 
controller. 
Connect the pump to the 
controller. 
Pressure switch is not 
connected. 
Connect the pressure 
switch. 
Compressor does not start 
(after 10 seconds). 
Pump relay (K4) is open. 
Replace the controller. 
Compressor stops and 
does not restart. 
Pressure in the tank has not 
subsided to the pressure 
switch cut-in setting. 
No action. Wait for the 
pressure to subside. 
Internal leak. 
Check for leaks. Refer to 
Section 6.11. 
Compressor does not stop 
when the demand is low 
(less than 5 LPM). 
Pump has low output 
pressure. 
Rebuild pump. 
Shipping screws have not 
been completely removed. 
Ensure the screws are 
completely removed. 
Instrument vibrates 
excessively. 
Compressor shock isolator 
screws are loose. 
 
Tighten the screws.