Denso BHT-7500S User Manual page 183

Charging Operation and LED Indication
Operator's Action
Place the BHT
on the CU-7001.
⇓
After approx. 4 hours
⇓
Remove the BHT.
Chapter 5. Handling the CU-7000 (Option)
CU-7001 Status
On standby
⇓
Normal charging
⇓
Charging completed
⇓
On standby
163
Indicator LED on
the BHT
OFF
ON
(in red)
ON
(in green)
OFF