The Carrier 30GT515165 MBB Board serves as the primary Microprocessor Board (MBB) for legacy 30GT series reciprocating chillers. This Carrier Flotronic control board is essential for managing compressor staging, electronic expansion valve (EXV) positioning, and critical safety interlocks within the chiller's logic circuit. When diagnosing chiller control circuit failures or unresponsive communication between the display and the CPU, replacing the 30GT515165 board is often the necessary path for restoring system stability. This OEM component ensures high-precision monitoring of refrigerant pressures and temperatures, maintaining the narrow deadbands required for efficient industrial cooling. Due to the specific field-programmable parameters inherent to these controls, you must provide the chiller model and serial number at the time of order to ensure correct firmware configuration. This HVAC circuit board replacement is built to the original engineering specifications for Carrier 30GT reciprocating chillers, providing seamless integration with existing Comfort Network (CCN) protocols.

Carrier 30GT515165 MBB Board (Need model & S/N to order)

Notes

Item is Non Cancelable / Non Returnable

• Precise Compressor Sequencing: Manages complex lead-lag operations to balance runtime and prevent short-cycling in Carrier 30GT air-cooled chillers.
• OEM Communication Protocols: Fully compatible with Carrier Flotronic system controls and legacy CCN networks for remote monitoring.
• Integrated Fault Diagnostics: Facilitates rapid troubleshooting by monitoring circuit sensors and reporting precise alarm codes via the processor.
• Technical Reliability: Engineered for the high-vibration environment of industrial mechanical rooms, ensuring long-term signal integrity for chiller microprocessor controls.

Common Technical Questions

How do I confirm if my 30GT515165 board is faulty?
Verify 24VAC power at the input terminals. ???? the display is blank despite proper voltage, or if you encounter persistent "Communication Loss" alarms that are not resolved by checking the ribbon cables, the MBB board likely requires replacement.

Can I install this board without the serial number?
No. The Carrier 30GT515165 requires specific factory or field configuration based on your chiller's tonnage and refrigerant type. Providing the model and serial number ensures the board logic matches your specific machine configuration.

Does this board control the electronic expansion valve?
Yes, the 30GT515165 Microprocessor Board processes data from the thermistors and transducers to provide the step-motor output signals necessary for EXV modulation and superheat control.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.