Fault Phenomenon: SANY SAP125C paver cab interior is stuffy, AC vents not blowing cold air.

Troubleshooting Process:
– Checked refrigerant: refrigerant leak, low pressure.
– Checked compressor: compressor clutch not engaging.
– Checked condenser: condenser clogged with dust.
– Checked filter: AC filter clogged.

Root Cause: The AC condenser surface is completely clogged with asphalt soot and dust, causing poor heat dissipation and system high-pressure protection shutdown.

Required Parts: Clean condenser and recharge refrigerant.