HVAC, Appliance, CNC, and VFD Error Code Repair Guides
Browse repair guides for HVAC, appliances, refrigeration, CNC alarms, VFD faults, generators, boilers, water heaters, and commercial equipment.
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Hoshizaki E7 High Pressure Switch Fault
Hoshizaki E7 means the high-side pressure switch tripped. Check condenser airflow, fan operation, ambient heat, and refrigerant service needs.
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Hoshizaki E8 Low-Side Pressure Fault
Hoshizaki E8 means the low-side pressure switch opened. Check low charge, restrictions, iced evaporator, leaks, and switch faults before restart.
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Hoshizaki E9 Compressor Overload
Hoshizaki E9 means compressor overload or thermal cutout. Check condenser airflow, start relay, capacitor, pressure issues, and ventilation.
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Mitsubishi Mini Split E6 Communication Fault
Mitsubishi E6 means the indoor and outdoor units lost communication. Check S-Bus wiring, fuses, boards, and interference before replacing parts.