Atlas Copco SF 1, Инструкция

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7 Problem solving
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).
Compressor
Condition Fault Remedy
The compressor does
not start. Pressure too high. Compressor will start again when the
pressure drops to the starting pressure.
On/off switch (Q1) malfunctioning or
loose connection Have electrical connections checked.
Test switch. Replace if necessary.
Thermal overload of switch (Q1) Restart after cooling down.
Switch (TSHH) open or motor protection
relay (F21) tripped Wait for switch to cool down. Replace
switch if necessary.
Reset overload relay (F21).
Air pressure switch (PS) out of order Test switch, replace if necessary.
The compressor does
not stop and/or safety
valve blows. Air pressure switch (PS) opens too late
or not at all. Readjust switch, replace if necessary.
Safety valve (SV) opens too soon. Have valve replaced.
Pressure difference
between stopping and
starting cannot be
adjusted Air pressure switch (PS) out of order Replace if necessary.
Compressor capacity
or pressure below
normal Air consumption exceeds capacity of
compressor. Check equipment connected.
Choked air filter Remove and check filter. Replace if
necessary.
Safety valve leaking Replace valve.
Drive belts slipping. Check condition of belts and belt
tension. Correct or replace as required.
Compressor element out of order Consult the supplier.
Compressor
overheating and/or
shut-down by air
temperature switch
(TSHH) Insufficient compressor cooling Clean compressor element fins and fan,
see section
Cleaning .
Improve ventilation of compressor room,
see section
Installation proposal .
Reset overload relay (F21) if necessary.
Cooling fans (FN1 and FN2) out of
order. Check and correct, reset overload relay
(F21) if necessary.
Temperature shutdown switch out of
order. Replace switch.
Refrigerant dryer
For compressors with a built-in refrigerant dryer also:
Instruction book
2920 7110 11 39