Tronic KH 972 Operating Instructions Manual page 21

The various displays have the following
meanings:
• The control lamp
- The inserted batteries are not positioned correctly
in the charging slot .
- The batteries are possibly defective.
• The control lamp
The batteries are being charged.
• The control lamp
(red):
- The charge condition of the batteries is being
checked. The batteries cannot be charged. The
charging proces is interrupted.
• The control lamp
- The batteries are charged and the device has
switched over to retention charging.
does not glow:
continuously glows red:
starts to blink after 1 minute
continuously glows green:
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