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MIZUHOSI 2009
NW0510 Rev. D
27
CAUTION: Electrical shock hazard exists with access covers removed; use
caution when working in exposed areas.
1. Measure voltage at wall outlet to verify proper AC input is available (120V or 230V).
2. Inspect power supply cord for physical damage, continuity, and adequate resistance.
3. Inspect power switch/circuit breaker:
a. Plastic boot is in good condition.
b. Switch locks in the on and off positions.
c. Green light illuminates when switched on.
4. Verify proper voltage at output ports:
a. Refer to specifications (described above) and interconnect diagram.
5. Verify switchover from AC (mains) to battery operation:
a. With charged battery (24 volts or higher with power switch off) turn power switch
on.
b. Operate up/down function and pull power cord connector from table power-entry-
socket while motor is running.
c. The table should keep moving with only a minor slow-down of motor speed.
6. Repair option for damaged or non-functioning power supply is replacing entire power
supply tray assembly with new unit (see Replacement/Spare Parts List). Field repair
is not recommended.
9.2 Table Functions
Table is “dead”; no functions are operational:
•
Verify power cord is plugged into an appropriate AC receptacle and into the power
cord socket (located at the back end of pedestal).
•
Verify power switch (located on back end of pedestal) is on. If illuminated, table is
connected to live AC power. If no illumination, table may still operate on internal
battery power (hand pendant control buttons and lights will be illuminated).
•
Verify circuit breaker (part of power switch located on table-base panel) is not
tripped off (indicating table power overload condition. Find overload source prior to
resetting). To reset, switch power switch/circuit breaker off, then on.
•
Verify component circuit breakers (located on table-base panel) are not tripped off
(indicating component power overload condition. Find overload source prior to
resetting). Observe the three component circuit breaker buttons are not protruding
from circuit breaker access holes.
•
Verify floor locks are deployed (all four locking feet make firm contact with the floor).
Observe LOCKED WHEN LIT green light on control panel or FLOOR LOCK ON LED
on hand pendant illuminates.
Floor lock button on control panel not functioning:
•
Using the control panel, press and hold the DOWN TO LOCK control button. Verify
the LOCKED WHEN LIT green indicator on the control panel or FLOOR LOCK ON
LED on the hand pendant illuminates.
•
Verify the floor locks are deployed (all four locking feet make firm contact with the
floor). Using the control panel, press and hold the DOWN TO LOCK button on the
control panel. Try pressing the UP TO UNLOCK button and then repeat press and
hold the DOWN TO LOCK button.