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Section 9 - Maintenance Instructions
- Disconnect, tag, and lock out power source then release all pressure from the system
before attempting to install, service, relocate, or perform any service.
The following instructions are based on normal operation. If the compressor is in an excessively dusty area, increase frequency
of maintenance checks.
Weekly:
-
Drain condensate from receiver and traps
-
Check for unusual noise or vibration
-
Clean all external parts of the compressor and
motor
Monthly:
-
Manually test safety relief valve
-
Inspect air system for leaks
-
Tighten fitting, nuts, and screws as required
Note: The QRM2- air filter does not need to be checked or changed except at time of compressor overhaul
–
approximately 8,000 hours of operation.
Section 10 - Troubleshooting Guide
Symptom
Possible Cause(s)
Corrective Action
Motor hums and
runs slowly or not at
all.
1. Low or no voltage
2. Shorted or open motor winding
3. Defective check valve
4. Defective pressure switch -
contacts will not close
1. Check voltage during start. Voltage must be within
+/- 10% of nominal voltage to start motor. Increase
wire size if necessary, to lower voltage drop.
2. Replace compressor
3. Replace check valve
4. Repair or replace pressure switch
Reset mechanism
cuts out or fuses
blow repeatedly
1. Insufficient voltage to motor
2. Pressure switch set too high
3. Wrong fuse size
4. Piping too restrictive
5. Defective motor
1. Check voltage during start. Voltage must be within
+/- 10% of nominal voltage to start motor. Increase
wire size if necessary, to lower voltage drop.
2. Consult factory, adjust or replace
3. Be sure fuses, heaters and/or overloads are
properly rated or set
4. Add receiver vessel or increase pipe volume after
compressor
5. Consult factory
Unit short cycles
repeatedly
1. Piping too restrictive
2. Air leaks
1. Add receiver vessel or increase pipe volume after
compressor
2. Repair leaks
Compressor
overheating
1. Dirty intake filter
2. Wrong motor rotation
3. Air flow to fan blocked
1. Clean intake filter
2. Correct rotation
3. Clean air flow to fan or relocate unit
Excessive noise in
operation
1. Damaged bearings
2. Worn piston cup
3. Broken valves
4. Loose fan
5. Damaged fan guard
Contact Reliable for technical support
System pressure
builds slowly
1. Compressor sized incorrectly
2. Leaks or restrictions in piping
3. Dirty intake filter
1. Check system size and compressor sizing
2. Correct leaks and remove restrictions
3. Clean intake filter
WARNING
