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7.3 FUNCTIONAL CHECK &
SAFETY INSPECTION
(continued)
FUNCTIONAL CHECK &
SAFETY INSPECTION
DANGER
Disconnect power before servicing unit.
Risk of electrical shock.
Follow the following procedures carefully, paying particular attention to test
setups. Any deviation from the setups, procedures, or test equipment may result
in incorrect or misleading results.
Before making any repairs, be sure to recheck your test setup, procedure, and
test equipment.
Test equipment should be calibrated in accordance with NIST (National Institute
of Standards and Technology) guidelines to insure accurate readings.
a) Condition of Chassis
The following inspections should be performed:
1.
The chassis should be clean and relatively free of rust and corrosion.
2.
Exterior screws should be tight
3.
Legends, markings, and operator instructions should be legible.
4.
Dirt that has accumulated in vents and cooling fins within the
machine should be removed with a vacuum cleaner or compressed
air hose. This will require removal of the rear baffle assembly.
5.
Check that the casters are tight and functioning properly.
6.
The quick-disconnect fittings on the machine may become stiff and
difficult to engage. If so, apply a silicone-base lubricant to the inside
of the machine fittings and the outside of the blanket connector.
7.
Clean the Probe Check Well according to the procedure described
in section 7.2, p. 19.
8.
Inspect the fluid system for debris and any sign of algae growth.
Clean according to
Cleaning Procedures, Fluid System
(section 7.2).
b) Attachment Plug
Examine the attachment plug on the line cord to be sure that it is in
good condition.
c) Line Cord and Strain Reliefs
Examine the line cord along its entire length for physical damage, such as cuts
or cracked insulation. A damaged line cord should be replaced rather than
repaired. Check the quality of the strain reliefs at both ends of the line cord.
d) Circuit Breaker
A worn out circuit breaker can be responsible for intermittent shutoffs,
with no other apparent indications of failure.
Examine the physical condition of the circuit breaker, paying particular
attention to the push-on terminals at the rear of the breaker. Terminals
should be snug. Replace breaker and/or terminals if there is discoloration
or any indications of heating.
Cycle the switch on and off several times. The switch should have a
positive engagement (“click”) for the
OFF
and
ON
positions.
21
SERVICE MANUAL
Medi-Therm II
Содержание MEDI-THERM II MTA5900 Series
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