Chapter 11 : Troubleshooting - Delta Ultron HPH Series User Manual

When you see the following problems appear on the LCD, please follow the solutions shown below.
No. Alarm Message
1 SHORT CIRCUIT
2 INVERTER FAIL
3 OVER
TEMPERATURE
4 PFC AMBIENT
OVER TEMP. FAIL
5 INVERTER SCR
OPEN
6 BYPASS SCR
OPEN
7 OVERLOAD
8 FAN FAIL
9 BYPASS SCR
SHORT FAIL
10 INPUT SCR
SHORT FAIL
11 OUTPUT FUSE
FAIL
12 AUX POWER FAIL
13 INDUSTRY
PROTECT
14 BATTERY
REVERSED

Chapter 11 : Troubleshooting

Possible Cause
Output has a short circuit issue.
Inverter is damaged.
The UPS temperature is too high.
The UPS temperature is too high.
Inverter SCR driver is abnormal.
Bypass SCR driver is abnormal.
The UPS is overloaded.
Fans are damaged or stuck.
1. Bypass SCR driver is damaged.
2. Bypass SCR has a short circuit
issue.
1. Input SCR driver is damaged.
2. Input SCR has a short circuit
issue.
Output fuse is broken.
Auxiliary power is damaged.
In industrial mode, output has an
over current issue.
Batteries are connected in re-
verse.
Contact service personnel.
Contact service personnel.
1. Choose a well-ventilated area.
2. Decrease some loads.
3. Check if fans run normally.
1. Choose a well-ventilated area.
2. Decrease some loads.
3. Check if fans run normally.
Contact service personnel.
Contact service personnel.
Remove some unnecessary loads
to let total load capacity below
Contact service personnel.
Contact service personnel.
Contact service personnel.
Contact service personnel.
Contact service personnel.
Check if output is normal.
Please check the batteries' polar-
ity.
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Chapter 11 Troubleshooting
Solution