ATS CyberChiller Series - Manual (Page 30)

(©October, 2006)
CyberChiller Series Installation, Operation & Maintenance Manual
SYMPTOM PROBABLE CAUSE RECOMMENDATION
4-3
Condenser Pressure a. Non-condensable gas or air in the Recover system and recharge. Install
too High system. new drier/strainer.
b. Condenser air intake is blocked. Remove debris and clean condenser.
c. Overcharge of refrigerant. Reclaim excess refrigerant from system.
d. Condenser fan not operating. Check pressure/temperature operating
switches and motor. Replace as needed.
e. Condenser pressure regulating Adjust to obtain correct pressure.
valve setting too high.
3. Air in system - bleed system.
4. Check all strainers and clean if
needed.
Condenser Pressure a. Loss of refrigerant (indicated by Locate and repair leak. Recharge
too Low bubbles in sight glass). system.
b. Condenser fan controls not set Adjust or repair controls.
properly.
Noisy Compressor a. Expansion valve stuck in open Ensure feeder bulb is tight on suction
position (abnormally cold suction line). line. Check operation and superheat.
b. Broken compressor valve Replace compressor.
(compressor knocking, suction
pressure rises faster than 2lbs/min
after shutdown).
c. Worn or scarred compressor Replace compressor.
bearings.
d. Liquid slugging. System overcharged. Reclaim excess
refrigerant.
e. Scroll compressor not properly Phase correctly at main power source.
phased. DO NOT REWIRE COMPRESSOR.
Head Pressure Too High a. Low condenser airflow. (Indicated by Open air passages. Clean coil. Check
excessive warm air leaving the condenser fan(s).
condenser fan).
b. Air or other non-condensible gas Reclaim system and recharge. Install a
in system new drier strainer.
c. Overcharge of refrigerant. Reclaim excess refrigerant from system.
d. Condenser/drycooler fans not on. Check main voltage power source to unit.