Delta Modulon DPH Series User Manual page 211

No. Alarm Message
Bypass Input Freq
5
Out Range
Bypass Input
6 Volt Phase Seq
Abnormal
Bypass Volt Out
7
ECO Range
8
Bypass STS Over
9
Heat Warning
10 Bypass STS Fault
Possible Cause
1. The Input/ Bypass
Breaker (Q1) is turned
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.
The Input/ Bypass
Breaker (Q1) is turned
Heat dissipation is poor
or components are
damaged.
The bypass static switch
or its driving circuit is
abnormal.
10-3
Solution
1. Please check if the Input/ Bypass
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 or frequency. If it is abnormal,
please wait for the bypass AC source to
be restored.
1. Please check if the Input/ Bypass
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 inlet. 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.
Please contact service personnel for
assistance.
10 Troubleshooting