Bryant communicating system shows code 57; indicates compressor current or inverter fault on variable-speed models. Outdoor unit may not start or may shut down quickly.

Safety first: Turn off power at the main breaker and outdoor disconnect. High-voltage and stored energy in inverter circuits are dangerous.

Homeowner-level checks:

• 1. Inspect power connections: With power off, remove the outdoor unit panel and check that all line voltage lugs are tight and free of burn marks. Do not attempt to tighten if you are not comfortable working near high-voltage components.
• 2. Check for obvious damage: Look for burnt components, melted wiring, or a burnt smell near the inverter module or compressor terminals. If present, do not re-energize the unit.
• 3. Verify supply voltage (if qualified): A licensed electrician or HVAC technician should verify that line voltage is within Bryant specifications and that there are no severe voltage drops.
• 4. Do not repeatedly reset: Repeatedly cycling power to clear code 57 can worsen damage to the inverter or compressor.

Professional service required: Inverter and compressor diagnostics require specialized tools and training. Contact a Bryant-authorized service provider.