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SCI-MHVAC-CASE-002
High-Pressure Trip Investigation
Majesty 100 ft | MAR-IX three-chiller system
ASSESSMENT
Repeated high-pressure trips were investigated across the chilled-water loop, seawater circuit, refrigerant charge condition and controls. The final test separated the corrected faults from the remaining pump risk.
The system completed an approximately five-hour monitored test without another recorded high-pressure trip. Final close-out remained dependent on restoring seawater-pump redundancy and resolving the air-side blower defects.
- 3
- Chiller units
- 50 psi
- High-side reduction
- 5 h
- Monitored test
EQUIPMENT DETAILS
System profile
- Yacht
- Majesty 100 ft motor yacht
- Chiller
- MAR-IX chilled-water system
- Chiller quantity
- 3 units
- Reported capacity
- 100,000+ BTU per chiller
- Distribution
- Total FCU/AHU count not stated; two blower defects recorded
- Water-side baseline
- Approximately 0.2 bar recorded against a 2-3 bar target
INSPECTION SCOPE
What was checked
- 01Fault-history review for high-pressure and chilled-water sensor alarms
- 02Chilled-water pressure, air removal and circulation checks
- 03Seawater pump operation, condenser flow path and seawater temperatures
- 04Pressure and compressor-current monitoring before and after correction
FIELD EVIDENCE
What the inspection showed
- Hot seawater and restricted heat rejection reduced the available condensing margin.
- A failed seawater pump removed operating redundancy.
- A separate chilled-water outlet sensor fault was corrected and verified.
- High-side pressure reduced from 460 psi to 410 psi during the recorded work sequence.
PUBLISHED REPORT
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