Step 4 - Checks Operation of Actuator

STEP 4: Checks operation of each actuator
Display shows "41" in STEP 4 mode.
When DEF switch is pressed one time, display shows "42".
Thereafter, each time the switch is pressed, display advances one number at a time, up to "46" then returns to "41".







During inspection in STEP 4, the auto amp. will forcefully transmit an output to the affected actuators. The corresponding code Nos. are shown on display as indicated in the table.
Checks must be made visually, by listening to any noise, or by touching air outlets with your hand, etc. for improper operation.
Operating condition of each actuator cannot be checked by indicators.