18
Table 8 — Troubleshooting
SYMPTOM
PROBABLE CAUSE
REMEDY
Compressor Does Not
Run
Main power line open
Replace fuse or reset circuit breaker.
Loose terminal connection
Check connections.
Improperly wired controls
Check wiring and rewire.
Low line voltage
Check line voltage; determine location of voltage drop.
Compressor motor defective
Check motor winding for open or short. Replace compressor if
necessary.
Seized compressor
Replace compressor.
High level gage alarm
Check refrigerant level and remove excess.
Compressor Cycles On
High-Pressure Control
High-pressure control erratic in action
Check capillary tube for pinches. Set control as required.
Discharge valve partially closed.
Open valve.
Air in system
Purge system.
Condenser scaled.
Clean condenser.
Condenser water pump or fans not
operating.
Start pump or fans.
Unit Operates Too Long
Isolation valves partially open
Close valves.
System Noises
Piping vibrations
Support piping as required. Check for loose pipe connectors.
Insufficient compressor oil
Add oil.
Compressor Loses Oil
Leak in system
Locate and repair leak.
Plugged or stuck compressor oil return
check valve
Repair or replace valve.
Liquid refrigerant carries oil out of
compressor
Check to ensure only refrigerant vapor enters compressor suc-
tion line. Add oil as necessary.
Motor shutdown on internal thermal protec-
tion high temperature cutout.
High temperature cutout should reset within 120 minutes.
Содержание 19XR Series
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