Delta Modulon DPH series User Manual page 216

When you see the following alarm messages appear on the LCD, please follow the solutions shown
below. If you see other alarm messages that are not listed in the table below, please contact Delta
service personnel for assistance. Do not perform troubleshooting if you are not trained for it.
Alarm
No.
Message
Mains Input
1 Volt/ Freq Out
Range
Mains Input
2 Volt Phase
Seq Abnormal
Mains Input
3
Breaker Off
Bypass Input
4 Volt Out
Range
Bypass Input
5 Freq Out
Range
Modulon DPH Series
Possible Cause
1. The input breaker or
switch is turned off.
2. The main AC source's
voltage or frequency is
abnormal.
The wiring is incorrect.
The input breaker or switch
is turned off.
1. The bypass breaker or
switch is turned off.
2. The bypass AC source's
voltage is abnormal.
1. The bypass breaker or
switch is turned off.
2. The bypass AC source's
frequency is abnormal.
1. Please check if the input breaker or switch
is turned off or not. If yes, please turn it on.
2. Please check if the main AC source's
voltage or frequency is abnormal or not. If
yes, please wait for the main AC source to
be restored.
3. If the alarm message still exists after the
solutions mentioned above have been
executed, please contact service personnel.
Please check the wiring and phase sequence
of the main AC source, and contact service
personnel for assistance.
1. Please check if the input breaker or switch
is turned off or not. If yes, please turn it on.
2. If the alarm message still exists after
the solution mentioned above has been
executed, please contact service personnel.
1. Please check if the bypass breaker or
switch is turned off or not. If yes, please turn
it on.
2. Please check if the bypass AC source's
voltage is abnormal or not. If yes, please
wait for the bypass AC source to be
restored.
3. If the alarm message still exists after the
solutions mentioned above have been
executed, please contact service personnel.
1. Please check if the bypass breaker or
switch is turned off or not. If yes, please turn
it on.
2. Please check if the bypass AC source's
frequency is abnormal or not. If yes,
please wait for the bypass AC source to be
restored.
3. If the alarm message still exists after the
solutions mentioned above have been
executed, please contact service personnel.
10-2
Solution