Delta DPS-400K - Alarm Messages and Solutions

11-2
Ultron DPS Series
When you see the following alarm messages appear on the LCD, please follow the solutions shown
below.
No. Alarm Message Possible Cause Solution
1 MAINS INPUT
VOLT OR FREQ
NOK
1. The Input Switch (Q1) is
turned off.
2. The main AC source’s
voltage or frequency is
abnormal.
1. Check whether the
Input Switch
(
Q1 ) is turned off. If yes, turn it on.
2. If the Input Switch (Q1) is turned
on but the alarm still exists, contact
service personnel.
3. Check if the main AC source’s
voltage or frequency is abnormal. If
yes, please wait until the main AC
source becomes normal.
2 MAINS INPUT
PHASE SEQ NOK
Wrong wiring. Check if the main AC source’s wiring
and phase sequence are correct. If
not, please contact service personnel.
3 PWR UNIT #n
PFC FUSE OPEN
SHUTDOWN
PFC fuse is fused. Contact service personnel.
4 PWR UNIT #n
INV FUSE OPEN
SHUTDOWN
Inverter fuse is fused. Contact service personnel.
5 PWR UNIT #n
GENERAL FAULT
Power unit’s control circuit has
abnormalities, e.g. abnormal
auxiliary power, failing soft
start, etc.
Contact service personnel.
6 SYSTEM
GENERAL FAULT
System’s auxiliary power is
abnormal.
Contact service personnel.
7 BAT CABINET
OVER HEAT
1. Battery cabinet’s
temperature is too high.
2. Battery cabinet has
abnormalities.
1. Decrease the battery cabinet’s
temperature.
2. Check if the battery cabinet has
any abnormality. If yes, contact
service personnel.
8 BAT TEST FAIL 1. Wrong battery wiring.
2. Battery abnormality.
1. Check if battery grounding is
correct or not. If not, contact
service personnel.
2. Check if battery has abnormalities.
If yes, contact service personnel to
replace battery.