Error, fault and alarm codes of products - what each code means, its causes and what to do - read from the manufacturers’ manuals, with the manual page each answer comes from.
Bypass voltage out of range causes a Byp.Volt Out of range alarm. The manual's first action is: “ALARM”
Momentary inverter over-current causes an OL or PowerUnit error alarm. The manual's first action is: “ALARM”
Inverter overload causes an Overload > 100% alarm. The manual's first action is: “ALARM”
AC input phase rotation error causes an I/P phase rotation alarm. The manual's first action is: “ALARM”
AC input voltage out of range causes an I/P Volt out of range alarm. The manual's first action is: “ALARM”
CB3 open causes a CB3 abnormal. The manual's first action is: “CALL SERVICE ENGINEER”
52S not turned on, or turned on without any command when manual transfer causes a 52S abnormal. The manual's first action is: “CALL SERVICE ENGINEER”
Auto transfer of frequent occurrence based on overload causes a Load abnormal. The manual's first action is: “CHECK LOAD”
52S not turned off or turned off without any command causes a 52S abnormal. The manual's first action is: “CALL SERVICE ENGINEER”
Driven IC of pulse transformer on Gate drive PCB abnormality causes a Control circuit error. The manual's first action is: “CALL SERVICE ENGINEER”
Control power supply abnormality causes a Control power abn. The manual's first action is: “CALL SERVICE ENGINEER”
Backup power supply (+5V) abnormality causes a Control power abn. The manual's first action is: “CALL SERVICE ENGINEER”
Isolated 24V power supply for external input relay abnormality causes a Control power abn. The manual's first action is: “CALL SERVICE ENGINEER”
D/A converted voltage abnormality causes a Control circuit error. The manual's first action is: “CALL SERVICE ENGINEER”
A/D converted voltage abnormality causes a Control circuit error. The manual's first action is: “CALL SERVICE ENGINEER”