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.
Batt. dep. warning means a warning has been issued before the battery runs out. The manual's first action is: “ALARM”
Overload (kW) means the inverter is overloaded with more kW than it can handle. The manual's first action is: “ALARM”
Battery depleted indicates the inverter has stopped due to low battery power. The manual's first action is: “ALARM”
Interrupted transfer means a bypass transfer was interrupted and applied. The manual's first action is: “ALARM”
Emergency byp. SW on means the emergency bypass switch is turned on. The manual's first action is: “ALARM”
EPO means an emergency stop has been applied to the system. The manual's first action is: “ALARM”
Transfer prohibition means the system has prohibited a transfer due to an unspecified condition. The manual's first action is: “ALARM”
Bypass frequency out of range causes a Byp. freq. abnormal alarm. The manual's first action is: “ALARM”
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”