76 OCH0006F08/13/2024
CEILAIR
®
CW & DX IOM
4.3.4.2 STANDARD CLEANOUT PROCEDURE
If a compressor failure has occurred, determine whether it is an electrical or a mechanical failure. An electrical
failure is indicated by a distinct pungent odor when the system is opened. If a burnout has occurred, the oil
will be black and acidic. A mechanical failure will have no burned odor and the motor will attempt to run. An
abnormal or excessive noise may be present.
Analysis of the oil is the only way to determine the proper cleaning procedure for the refrigerant system. Acid
test kits are available from several manufacturers for measuring the acid level in the oil. These can make
accurate acid measurements. If acid test kits are not available, check the oil by sight and smell to determine if
contamination remains in the system.
All electrical connections should be checked to ensure they are tight and properly made. Check all fuses,
contactors, and wiring. The contactor should be examined and replaced if contacts are worn or pitted.
If there is acid in the oil, there has been an electrical failure that caused the compressor motor to burn out.
The acid diffuses throughout the refrigeration system and must be removed using a burnout filter kit before
a new compressor is placed in service. The entire refrigeration circuit must also be cleaned of harmful
contaminants left by the burnout. See section 4.3.4.3 for Burn-Out/Acidic Cleanup Procedure.
If there is no acid in the oil, there has been a mechanical failure. See section 4.3.4.2 for Standard Cleanout
Procedure.
CAUTION
Damage to a replacement compressor caused by improper system cleaning constitutes abuse under the
terms of the warranty. This will void the compressor warranty. Always consult the factory prior to replacing
the compressor.
CAUTION
POE oil is used in systems with R407C and R410A refrigerant. If a replacement compressor is provided,
ensure that it is filled with POE oil before installing.
4.3.4.2 Standard Cleanout Procedure
WARNING
Avoid touching or contacting refrigerant gas and oil with exposed skin. Severe burns will result. Use long
rubber gloves when handling contaminated parts.
NOTE Mechanic or Technician Required
Cleaning operations must be performed by a journeyman refrigeration mechanic or air conditioning
technician.
1. If your unit is equipped with an E² controller, turn the A/C unit off by pressing and holding the Enter key.
2. Turn off power to the unit at the main power disconnect switch.
3. Remove the old compressor and install the new compressor.
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