Veichi AC310 - Y Output Detection and Maintenance; Relay Detection and Maintenance

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AC310 Universal AC Drive Service Manual

3.3.2 Y Output Detection and Maintenance

1. After power on, use multimeter DC voltage to measure the voltage of Y port to COM, the

voltage is below 1V is qualified; after running, the voltage of Y port to COM is below

24±0.75V is qualified.

2. If the detected voltage value is abnormal, the Y terminal function is abnormal, check O6

and T2, replace the damaged components.

Resistances R208=820Ω/0402 R32=2K/0402

R33=20K/0402 R34=10K/0402

Capacitors

C92=10NF

Optocoupler

O6=EL3HL

triode (vacuum tube or transistor)

T2=MMBT4401LT1

Diodes

D1=1N4148WS

3.3.3 Relay Detection and Maintenance

1. TA-TC is normally open, TB-TC is normally closed, in case of failure, TA-TC is normally closed,

TB-TC is normally open.

2. TA-TB-TC output is abnormal, relay REL does not work, test O7, T1, REL2 is damaged.

Resistances

R6/R7/R16/R17/R26/R27/R11/R12/R1/R2=2.2

k/0805 R8/R18/R28/R13/R3=2K/0402

R9/R19/R29/R14/R4=12K/0402

Optocoupler

O9、O1、O3、O2、O4=EL3H4

Capacitors

C3/C7/C11/C5/C1=100nf/

0402

C4/C8/C31/C6/C2=1nf/04

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