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Chapter 11 Troubleshooting
Chapter 11 : Troubleshooting
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 some loads.
3. Check if fans run normally.
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4
PFC AMBIENT
OVER TEMP. FAIL
The UPS temperature is too high.
1. Choose a well-ventilated area.
2. Decrease some loads.
3. Check if fans run normally.
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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
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.
Please check the batteries’
polarity.
15
INPUT PHASE
SEQUENCE FAIL
Input phase sequence is wrong.
Check input phase sequence.
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