Carrier 38AH024-034 User Manual

Critical safety warning regarding electrical shock hazards during servicing.

Steps for leak testing the refrigerant system and performing dehydration using specified methods.

Guidelines for charging the system with R-22 refrigerant using the liquid charging method.

Essential checks before unit start-up, including valve positions, electrical connections, and oil levels.

Steps to safely start the condensing unit, including initial settings and breaker operations.

Method for adjusting refrigerant charge based on pressure and temperature readings for optimal performance.

Procedure to verify compressor oil levels after adjusting refrigerant charge under loaded conditions.

Lists common reasons for the complete shutdown of the unit, including safety trips.

Role of the OPS in stopping the compressor and unit if oil pressure is insufficient.

Identifies problems and solutions when the compressor contactor is open or closed.

Troubleshooting steps for when the compressor stops due to a high-pressure switch trip.

Diagnosing issues when the compressor cycles on the low-pressure switch.

Diagnosing and resolving issues related to insufficient cooling while the compressor is running.

Checklist items for the outdoor unit, controls, indoor unit, and piping before start-up.

Procedure for checking voltage imbalance and understanding its impact on system start-up.

Verify that compressor oil levels are visible in the sight glasses.