When summer temperatures rise, it’s not just people who suffer—compresseurs d'air struggle too. Ambient heat may not directly shut them down, but it certainly triggers high-temperature faults.
🌞 1. How Summer Weather Impacts Compressors
- Thinner air at high heat: Reduced air density means the PM VFD compressor stays under load longer, generating more heat and higher operating temperatures.
- Design limits exceeded: Most compressors are rated for 30–40 °C ambient conditions. Higher temperatures push internal temps closer to shutdown thresholds, risking automatic stoppage or damage.
🛠️ 2. Common Mechanical Issues in PM VFD Compressors
| Fault Area | Cause |
|---|---|
| Oil Stop Valve | Fails → oil starvation → overheating → possible rotor burnout |
| Oil Filter Clog | Blocks lubrication and cooling, increasing heat |
| Thermostatic Valve Fault | Bypasses cooler → hot oil enters head → temperature spikes |
| Oil Flow Regulator | Improper spray oil → under-lubrication → overheating |
| Oil Cooler Issue | Poor cooling in water/air systems → high temps |
| Airend Wear | Poor lubrication or worn parts → extra friction → heat buildup |
| Air Filter Issue | Clogging reduces flow → increased load → heat |
| Oil–Air Separator Fault | Blockage → pressure and temperature rise |
| Sensor/Controller Error | False readings → inappropriate control actions |
Regular checks and timely replacement of these components help prevent sudden shutdowns.
🧴 3. How Lubricant Quality Affects Temperature
- Low oil level → poor heat dissipation → overheating
- Degraded oil → thickens → loses flow and cooling ability
- Incorrect viscosity → low viscosity = poor lubrication; high viscosity = poor heat transfer
- Poor oil quality → oxidation, sludge, foam, water retention → all increase temperature risks
🛡️ 4. Mitigation Strategies for Summer Operation
A. Compressor Room & Installation
- Provide adequate ventilation and exhaust via fans or louvers.
- Maintain space between units for airflow and service access.
- Protect outdoor units from dust, water, and sun exposure.
B. Scheduled Maintenance
- Replace filters, oil, coolers, and wear parts regularly.
- Monitor electrical parameters (voltage/current).
- Log inspection data for predictive diagnosis.
- Clean exterior components and ensure fan function.
C. Upgrade to Quality Components
- Choose high-temp-rated filters and separators.
- Utilisation viscosity-appropriate, oxidation-resistant oils with good water separation.
- For humid or coastal locations, pick oils with strong anti-emulsification capabilities.
- Implement routine oil analysis to guide maintenance timing.
✅ 5. Baldor’s Summer Performance Advantage
At Baldor, our expertise in PM VFD air systems includes:
- Integration with cooling-optimized accessories for high ambient scenarios
- Configurable operating limits and control logic to handle heat stress
- Proactive after-sales support during peak temperature seasons