Johnson Controls Frick RWF II 177 User Manual

RWF II ROTARY SCREW COMPRESSOR UNITS
MAINTENANCE
070.610-IOM (JUN 11)
Page 38
TROUBLESHOOTING THE RWF II COMPRESSOR
SYMPTOM PROBABLE CAUSES and CORRECTIONS
EXCESSIVE NOISE and VIBRATION Main oil injection valve may be closed. Open valve.
Main oil injection valve may be open too far. Adjust.
Bearing damage or excessive wear. CONTACT Frick Factor or Frick service.
Slide valve/slide stop out of calibration (over- or undercompression)
Coupling loose on shaft. Tighten coupling. Replace if damaged.
If motor or compressor have been reinstalled,
check that installation done according to S70-660 SM
Refrigerant ood back. Correct system problem.
SLIDE VALVE and/or SLIDE STOP
WILL NOT MOVE
4-way hydraulic control valve failed. Repair or replace.
Slide stop indicator rod stuck. Contact Frick Factor or Frick service for assistance.
Check both S.V. and S.S. feedback devices for wiring and resistance.
Compressor must be running with sufcient oil pressure.
Unloader piston stuck. Contact Frick Factor or Frick service for assistance.
Slipper seals worn out or damaged. Contact Frick Factor or Frick service for assistance.
NOTE: Troubleshooting the compressor is limited to identifying the probable cause. If a mechanical problem is suspected
contact the Service Department. DO NOT ATTEMPT TO DISASSEMBLE THE COMPRESSOR.
TROUBLESHOOTING THE OIL SEPARATION SYSTEM
SYMPTOM PROBABLE CAUSES and CORRECTIONS
GRADUAL OIL LOSS WITH AN OIL
LEVEL IN THE COALESCER
SECTION SIGHT GLASS
Maintaining too high an oil level, lower level.
Refrigerant carryover or liquid injection overfeed ing, correct operation.
Loss of suction superheat. Adjust evaporator feeds.
Contaminated oil, damaged or not seated coalescer lter elements. Replace
oil charge and coalescers.
Coalescer return valve closed. Open return valve.
Coalescing oil return line strainer blocked. Clean.
RAPID LOSS WITH NO OIL LEVEL
IN THE COALESCER SECTION
SIGHT GLASS
On shutdown, compressor unit suction check valve did not close. Repair valve.
Suction check valve bypass valve open too far to meter ow. Close valve.
Coalescers loose or not seated properly. Correct or replace.
On economized unit: economizer check valve not working. Repair or replace.
Economizer check valve not in automatic position or manually opened. Place in auto position.
SHAFT SEAL LEAKAGE If leakage exceeds normal allowable rate of 7 drops per minute, replace seal.

Johnson Controls Frick RWF II 177 Specifications

General

Brand	Johnson Controls
Model	Frick RWF II 177
Category	Air Compressor
Language	English