No. Maintenance Item Possible Fault Cause Suggestion
5 Check whether the DC RTN
+ busbar is grounded.
The DC RTN+ busbar is not
properly grounded.
Connect the ground cable to
the DC RTN+ busbar
properly.
6 Check whether cables have
overheated and are
deteriorating.
● Cables are too thin.
● Cables are not properly
routed.
● Replace the cables with
cables of the required
thickness.
● Route the cables properly.
7 Check whether cables are
misshapen by metal parts.
Cables are not properly
installed.
Replace the cables and
adjust the cable routing.
8 Check whether cables pass
behind the air exhaust
vents of rectiers.
Cables are not properly
installed.
Adjust the cable routing to
prevent cable overheating.
9 Check whether cable
insulation is damaged.
Cable insulation is damaged. Reinsulate the cables with
insulation tape.
4.1.11 Routine Maintenance for ESMs
● To ensure the optimal operating status of ESMs, check and maintain ESMs
regularly. When maintaining ESMs, record related information for checking ESM
management parameters in the future.
● Install ESMs in a dry and, clean, and ventilated environment that is far away
from sources of ignition. Avoid direct exposure to sunlight or rain water.
● Keep ESMs away from strong infrared radiation, organic solvents, and corrosive
gases.
● Ensure that battery cables do not come in contact with water.
Table 4-11 ESMs Routine maintenance
Maintenance
Interval
Maintenance
Item
Measure
Monthly Operating
environment
Keep ESMs far away from heat sources and avoid direct exposure
to sunlight.
Exterior If an ESM experiences damage, leakage, or deformity, disconnect,
take pictures, and then replace the faulty ESM.
Quarterly Cleanliness Clean the ESM exterior using dry cotton cloth. Exercise caution
when cleaning an ESM because its voltage is high.
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User Manual 4 Maintenance
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