How to check the hull unit
1.Press the POWER () switch on the control unit (for the display unit) to turn on
the equipment. Confirm that the lamps above the ON and 
switches light.
Transducer switches
2.Confirm that the 5V and UP lamps on the raise/lower control box are lit.
3.Remove the cover of the raise/lower control box and use a multimeter to measure the following voltages:
Terminal | Terminal No. |
| Voltage |
(1) – (2), (6) | 220 VAC | ||
| (2) – (3), (7) | – (8) | 220 VAC |
| (1) – (3), (6) | 220 VAC |
4.In the raise/lower control box, set the TEST/NORMAL switch to TEST. Press the [DOWN] switch to confirm that the transducer lowers. Also, while the transducer is being lowered, check that the MD LED lights when the MD L. SW kicks. Note that the MD L. SW does not stop the transducer when the TEST/NORMAL switch is in the TEST position.
TEST |
| |
OFF |
| 5V |
NORMAL | ||
| L.SW |
|
UP | MD | DN |
UP | DOWN | |
Control unit (for the hull unit)
5.Press and release [DOWN] switch. Confirm that the transducer stops at the moment the switch is released.
6.Press the [DOWN] switch again. Confirm that the transducer stops at the moment the lower limit switch kick.
7.Confirm that the [UP] switch operators in a similar manner.