Delta Modulon DPH Series User Manual page 233

Alarm
No.
Message
Bypass Input
5
Freq Out Range
Bypass Input
Volt Phase Seq
6
Abnormal
Bypass Volt Out
7
ECO Range
Bypass
8
Bypass STS
Critical Over
9
Heat
Possible Cause
1. The bypass switch is
turned off.
2. The bypass AC source's
frequency is abnormal.
The wiring is incorrect.
The bypass AC source's
voltage or frequency exceeds
the range for ECO mode.
For single input application,
For dual input application,
the bypass switch is turned
Heat dissipation is poor or
components are damaged.
10-3
Solution
1. Please check if the bypass 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.
Please check the wiring and phase
sequence of the bypass AC source, and
contact service personnel for assistance.
Please check the bypass AC source's
voltage and frequency. If there is any
abnormality, please wait for the bypass
AC source to be restored.
1. Please check if the input 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 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. Check if any foreign matter blocks
the fans or air inlets. If yes, remove
the foreign matter.
2. Decrease some loads.
3. If the alarm message still exists
after the solutions mentioned above
have been executed, please contact
service personnel.
10 Troubleshooting