TROUBLESHOOTING GUIDE
3203 SERIES
8-2.0.0
5/22/2003
WARNING: BE SURE
BOOM IS SUPPORTED
BEFORE REMOVING SWITCH
OR BOOM WILL FALL.
C. Test Drop Out Relay - Pull socket
off Relay. Test continuity with power on
between 30 & 87. If no continuity then
replace relay. With power off check
continuity between 30 & 87a. If no
continuity then replace relay.
3 HOIST FAILS TO OPERATE IN
EITHER DIRECTION BUT ALL
HYDRAULIC FUNCTIONS
OPERATE.
A. Listen for relay click for hoist up
and hoist down. If relay doesn't click
check for voltage at left side control
terminal(small) when function is selected,
if no voltage then use procedure for
checking receptacle and pendant given in
1.C.
b. Check terminal A2 of hoist motor
for power when operating either hoist up
or hoist down. If there is voltage but
motor does not try to run or get hot then
motor is bad. If motor tries to run or gets
hot then voltage reading at A2 will be less
than 12 volts and motor may be dirty or
have oil in it from failed oil seal.
c. If there is no power at A2 only on
hoist up, then put test light across bottom
power terminals of hoist down relay. If
light comes on when hoist up is picked,
then hoist down relay is bad. If test light
doesn't light, put light across upper power
terminals of hoist up relay and pick hoist
up. If light comes on, replace hoist up
relay.
d. If there is no power at A2 only on
hoist down then put test light across
bottom power terminals of hoist up relay.
If light comes on when hoist down is
picked, then hoist up relay is bad. If test
light doesn't light, put light across upper
power terminals of hoist down relay and
pick hoist down. If light comes on,
replace hoist down relay.
NOTE: THERE ARE OTHER
WAYS TO TEST FOR CIRCUIT
CONTINUITY SUCH AS USING
VOLT METER OR TEST LIGHT AND
FOLLOWING CIRCUIT THROUGH
BY TESTING AT EACH POINT FOR
VOLTAGE TO GROUND.
1 ALL HYDRAULIC FUNCTIONS
INOPERABLE.
A. Pump does not run, pump relay
does not click. Jumper from upper left
power terminal of pump relay to left side
relay control terminal. If relay doesn't
click, replace relay. If relay clicks and
pump runs, check receptacle and pendant.
(see 1.C.)
b. If relay clicks but pump doesn't
run, check for voltage at pump motor
terminal. If no voltage replace pump relay.
If voltage is present, pump motor is bad or
pump is locked. If pump is locked motor
will get hot and voltage at motor terminal
will much lower than 12 volts.
2 PUMP RUNS BUT SINGLE
HYDRAULIC FUNCTION DOESN'T
WORK.
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