Huawei PowerCube 500 - Page 42

PowerCube 500 (CPS300-N18A1H)
User Manual
4 Preventive Maintenance
Issue 02 (2019-08-30)
Copyright © Huawei Technologies Co., Ltd.
36
Category
Check Item
Check
Method
Maintenance
Condition
Solution
tilted.
tilted.
pole.

Adjust the
tilted base.
Check whether
PV module
supports are
stable.
Shake the
supports
slightly.
Bolts are loose
and the
supports are
unstable.
Tighten the
loose bolts and
nuts.
Conducting
wire
Check whether
conducting
wires are
damaged or
cracked.
Visual
observation
Conducting
wires are
damaged or
broken.
Replace any
broken or
damaged
conducting
wires.
Wiring terminal
Check whether
the wiring
terminals are
connected
securely.
-
Wiring
terminals are
loose.
Secure the
wiring
terminals.
Electrical
specifications
Check whether
the open-circuit
voltage of a PV
module is
normal.
Multimeter
Under normal
sun exposure
(800 W/M
2
illumination
intensity
recommended),
ensure that the
open-circuit
voltage is at
least 30% lower
than the
nominal value.
Replace the PV
module.
Table 4-5 PV module troubleshooting
Symptom
Possible
Cause
Solution
No output.

The cables
to PV
modules are
not
connected
properly.

PV modules
are faulty.

Check whether the cables are loose, disconnected, or
broken. If so, reconnect the cables properly or replace
them.

Use a multimeter to check whether each PV input has
an output voltage, and use a clamp meter to check
whether each PV input has a current. If no voltage or
current is detected, check the PV modules.

Use a multimeter to check whether each PV module
has an output voltage. If a PV module has no output
voltage, replace it.

Check whether the output voltage of each PV module