Rheem RARL-JEC Installation Instructions - Page 43

LOSS OF LUBRICATION SYMPTOMS Compressor failures Low suction pressure Cold, Noisy compressor - Slugging Noisy compressor Cold, sweating compressor Low Load POSSIBLE CAUSE Line tubing too long Line tubing too large Low charge Refrigerant leaks Dilution of Oil with Refrigerant Migration Flooding Reduced air flow Short cycling of compressor FLOODED STARTS SYMPTOMS Liquid in the compressor shell Too much liquid in system SLUGGING SYMPTOMS On start up TEV hunting when running FLOODING SYMPTOMS Poor system control using a TEV Poor system control using capillary tubes Thermostat setting Faulty pressure control Loose wiring Thermostat POSSIBLE CAUSES Faulty or missing crankcase heater Incorrect piping Overcharge POSSIBLE CAUSES Incorrect piping Oversized TEV POSSIBLE CAUSES Loose sensing bulb Bulb in wrong location Wrong size TEV Improper superheat setting Overcharge High head pressures Evaporator air flow too low CHECK OR REMEDIES Add oil to the recommended level Reduce pipe size to improve oil return Check system charge Repair and recharge Observe piping guidelines Check crankcase heater Check system charge Dirty filter Dirty coil Wrong duct size Restricted duct Advise customer Replace control Check all control wires In supply air stream, out of calibration, Customer misuse CHECK OR REMEDIES Replace crankcase heater Check Piping guidelines Check and adjust charge CHECK OR REMEDIES Review pipe size guidelines Check TEV application CHECK OR REMEDIES Secure the bulb and insulate Relocate bulb Use correct replacement Adjust, if possible; Replace, if not Check system charge Dirty heat pump Restricted air flow Recirculation of air Adjust air flow to 400 CFM/Ton 43