Problem Solving - Atlas Copco SF 15+ Instruction Book

8

Problem solving

Compressor
Condition
The compressor does
not start.
Safety valve blows.
Compressor capacity
or pressure below
normal.
Compressor module
overheating or
compressor shutdown
on high air
temperature.
Condensate trap
continuously
discharging air an
water
Refrigerant dryer
For compressors with a built-in refrigerant dryer also:
Condition
Dew point too high
94
Before carrying out any maintenance or repair, perform following steps:
• Stop the compressor and switch off the voltage.
• Open and lock the isolating switch to prevent an accidental start.
• Isolate the compressor by closing the outlet valve.
• Depressurize the system by opening the drain valve(s).
Fault
Pressure too high.
Loose connection.
Pressure too high
Safety valve opens too soon.
Air consumption exceeds capacity of
compressor.
Choked air inlet filter.
Safety valve leaking.
Compressor element out of order.
Insufficient compressor cooling.
Cooling fan out of order.
Automatic drain out of order
Fault
Air inlet temperature too high
Fuses blown
Shortage of refrigerant
Refrigerant compressor does not run
Evaporator pressure is too high
Condenser pressure is too high
Instruction book
Remedy
Compressor will start again when the
pressure drops to the starting pressure.
Check all electrical connections.
Check settings and correct.
Replace valve.
Check equipment connected.
Remove and check filter. Replace if
necessary.
Replace valve.
Consult your supplier.
Improve ventilation of compressor room.
Clean compressor element fins and fan,
see Cleaning the compressor
Check and correct.
Have the drain checked. Replace as
necessary
Remedy
Check and correct; see section
Reference conditions and limitations
Check fuses and remedy the cause.
Have circuit repaired or recharged.
See below
See below
See below
element.
2920 7140 52