8-5-2. Remedy; 8-5-2. Remedy ; Before carrying out adjustment- Page 130

8. ELECTRICAL MECHANISM 

123

BAS-311G, BAS-326G

8-5-2. Remedy 

 DANGER 

Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet 
before opening the cover of the control box. Touching areas where high voltages are present can result in severe 
injury.

1.  Be sure to note the following cautions when opening the control box to carry out inspections and adjustments. 

Electric shocks

High voltages can remain in large-capacity capacitors for up to 5 minutes in some circumstances, even when the power 
has been turned off. Accordingly, wait at least 5 minutes after turning off the power before carrying out the following 
operations. 

•

  Opening and closing the control box 

•

 Replacing 

fuses 

•

  Inserting and disconnecting connectors 

•

  Measuring resistance values 

•

  Any other tasks that may involve touching components inside the control box 

Injury

The fan inside the control box turns while the power is turned on, so be careful not to get anything caught in it. 
Be careful not to touch metallic objects such as the heat sink and cover when connecting and disconnecting connectors 
and making measurements. 

 
2.  When replacing the fuses, be sure to use a fuse with the same material and rating. 
 
 
 

Before carrying out adjustment

1. With the power turned off, check that all of the connectors are securely connected by referring to “8-4. Description of 

connectors”.  

2. Use the flowchart to check what sort of conditions the problem occurs under (#*). 
3. Carry out the inspections for the problems in the order of the numbers in the “Cause” column. 

Some inspection items require the control box to be open when the power is turned on and voltages are measured.
At such times, be extremely careful never to touch anywhere other than the specified locations. In addition, note 
that high voltages may remain for up to 5 minutes after the power is turned off.