xsto CT420SC Operation Manual page 40

NOTE: If the CT420SC is parked for more than one week, it
should be recharged before use.
Q6: Can anyone use the CT420SC?
A6: CT420SC is a heavy-duty handling equipment which requires
skilled operation skills. People with no qualifications are not allowed to
operate the machine.
Q7: hand-held controller Indication status analysis
A7: The fault is usually indicated on the controller screen, and the
related signal will flash accordingly. For example, if it is a key lock issue,
a key signal will flash; if the temperature is too high/low, a
thermometer signal will flash.
Q8：CT420SC lithium battery cannot be charged.
A8：Check if the fuse of the CT420SC lithium battery is broken. If it is
broken, replace it with a new one. Check whether the charger and its
fuse are normal or not. During normal charging, the charger displays
two red lights. If it is fully charged, the charger displays one red light
and one green light.