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11. Troubleshooting
If the following alerts are shown on the LCD, follow the solutions listed below.
No.
Alarm Message
Possible Cause
Solution
1
SHORT CIRCUIT
Output has a short circuit issue.
Contact service personnel.
2
INVERTER FAIL
Inverter is damaged.
Contact service personnel.
3
OVER TEMPERATURE
The UPS temperature is too high.
1. Choose a well-ventilated area.
2. Decrease load on UPS.
3. Check if fans run normally.
4. Clean filters if installed.
4
PFC AMBIENT OVER TEMP. FAIL
The UPS temperature is too high.
1. Choose a well-ventilated area.
2. Decrease load on UPS.
3. Check if fans run normally.
4. Clean filters if installed.
5
INVERTER SCR OPEN
Inverter SCR driver is abnormal.
Contact service personnel.
6
BYPASS SCR OPEN
Bypass SCR driver is abnormal.
Contact service personnel.
7
OVERLOAD
The UPS is overloaded.
Remove some unnecessary loads to let
total load capacity below 95%.
8
FAN FAIL
Fans are damaged or stuck.
Contact service personnel.
9
BYPASS SCR SHORT FAIL
1. Bypass SCR driver is damaged.
2. Bypass SCR has a short circuit issue.
Contact service personnel.
10
INPUT SCR SHORT FAIL
1. Input SCR driver is damaged.
2. Input SCR has a short circuit issue.
Contact service personnel.
11
OUTPUT FUSE FAIL
Output fuse is broken.
Contact service personnel.
12
AUX POWER FAIL
Auxiliary power is damaged.
Contact service personnel.
13
INDUSTRY PROTECT
In industrial mode, output has an over
current issue.
Check if output is normal.
14
BATTERY REVERSED
Batteries are connected in reverse.
Check the batteries’ polarity.
15
INPUT PHASE SEQUENCE FAIL
Input phase sequence is wrong.
Check input phase sequence.
16
INVERTER SOFT START FAIL
1. Inverter detection is abnormal.
2. Inverter’s driver is damaged.
Contact service personnel.
17
INNER COMMUNICATION FAIL
Inner communication cable is not well
connected.
Contact service personnel.
18
PFC SUPERVISOR FAIL
PFC CPU is damaged.
Contact service personnel.
19
DC BUS HIGH SHUTDOWN
1. Output has abnormalities.
2. The UPS has internal faults.
Contact service personnel.
20
DC BUS LOW SHUTDOWN
1. Output has abnormalities.
2. The UPS has internal faults.
Contact service personnel.
21
INPUT FUSE FAIL
Input fuse is broken.
Contact service personnel.
22
INVERTER SUPERVISOR FAIL
Inverter CPU is damaged.
Contact service personnel.
23
PFC SOFT START FAIL
1. Rectifier tube is damaged.
2. Driver is damaged.
Contact service personnel.
24
BYPASS PHASE SEQUENCE FAIL
Bypass phase sequence is wrong.
Check bypass phase sequence.
25
NTC OPEN FAIL
1. NTC is not connected well.
2. NTC line is broken.
Contact service personnel.
26
INVERTER OUTPUT SCR SHORT
1. Inverter SCR driver is abnormal.
2. Inverter SCR is damaged.
Contact service personnel.
27
BATTERY LOW SHUTDOWN
Battery voltage is low.
Charge the batteries.
Note:
If all possible causes are eliminated but the alarm still appears, contact Tripp Lite Technical Support.