Pylontech PowerCube-X1 Operation Manual page 21

5 Cannot close the power
Switch.
5 Open the Power Relay
Switch, but the relay can't
be open.
5 Turn on the BMS. The Status
LED is flashing red.
6 Turn on the BMS. The Status
LED is lighting red. And the
buzzer is noising.
7 Turn on the BMS. The Status
LED shows normal. But the
output relay can't be
actuation.
8 Turn on the BMS. The one
and the following of the
battery module's Status
LED lighting red or not
lighting.
9 Single Cell is over voltage/
low voltage.
(Check through the
monitor or maintenance
software.)
10 Battery module shows the
temperature is -40℃.
Temperature, Low
Temperature or Failure
Protection.
DC Output breaker is

fault.
The main control board

is failure.
The wire of the output

relay, or the wire of the
power relay switch in
the BMS is broken
Self-check can't pass.
 Output relay is non-
separable switching,.
 The buzzer is failure；
 Output relay False
alarm;
The wire of the output

relay or the wire of the
power relay switch in
the BMS is broken.
 Power Relay Switch is
open;
 This battery module has
failure;
 Its communication cable
failure;
 Its Address Distribution
failure.
 Cell voltage sampling
failure.
 Cell failure;
The wires of temperature
sampling failure.
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failure or not.
Check the DC output
breaker is fault or not. If it is
fault, change the control
module (BMS module).
Change the control

module (BMS module).
Check the wire got

loose or broken? Fix it.
Or the control module
(BMS module).
If something is wrong,
please contact with seller
or sells agent.
 Check the output relay.
If fault find out the short
circuit reason. Change
the relay or the control
module (BMS module).
 Change the control
module (BMS module).
Check the wire got

loose or broken? Fix it.
Or change the control
module (BMS module).
Close the Power Relay

Switch.
 Change this battery
module;
 Check the
communication cable;
 Check by professional
stuff.
 Check the wires of cell
sampling module;
 Change this battery
module.
Check the wires of
temperature sampling
18BISV0101