Service Guide - Thermo Scientific Lab-Line Imperial 3 Operation And Repair Manual And Parts List

NOTE: IT IS RECOMMENDED THAT QUALIFIED PERSONNEL PERFORM THE
FOLLOWING MAINTENANCE PROCEDURES AND REPLACEMENT OF PARTS
ONLY.
CAUTION: DO NOT ATTEMPT REPAIR OR SERVICE OF THIS UNIT BEFORE
FIRST REMOVING PLUG FROM ITS ELECTRICAL OUTLET.
HEATER REPLACEMENT:
Heaters should be replaced when the unit does not heat properly and
multiple meter measurements of resistance show a significant deviation from 144 ohms.
After unplugging the unit, move it out into an open area to provide easier access
to the back of the unit. Remove the back cover, then slide heaters out from their
positions under the floor and along the side-walls. Disconnect heater leads from the
terminals after carefully noting where the leads attach.
To re-install heaters, reverse the above procedure.
THERMOSTAT REPLACEMENT:
After unplugging the unit, remove the top cover of the unit to reach
control components. Expose 2 screws holding thermostat to the mounting bracket. After
removing thermostat from control panel, disconnect wiring while noting where each lead
attaches.
Remove back cover of unit to reach thermostat bulb, set in a bracket
under the chamber floor. Slide the bulb out of the bracket and through
the top hole to completely remove the thermostat.
Install new thermostat by reversing above procedure.
SWITCH OR STATUS LAMP REPLACEMENT:
Power switch and status lamps are snap-in mounting type.
Unplug unit, remove top cover and disconnect leads after noting where each
attaches. Push the switch out from the back. Slide the lamp body sideways to remove
lens. Reverse procedure to install new lamp.
Press replacement switch in from the front of the panel and then reconnect the
leads as noted. Switch is to be oriented so that the green lamp is toward the top.
REPLACING TEMPERATURE CONTROLLER:
1. Place ON/OFF switch in OFF position.
2. Unplug incubator from outlet power supply.
3. To remove controller from control housing:
• use both hands to firmly grip each side of the controller bezel
• press on the bezel side grips until the bezel tabs release
• slowly pull controller from housing
4. To install new, factory configured controller:
• Carefully slide new controller into controller housing.
NOTE: PCB contacts at rear of controller fit into contacts at rear of controller housing
• Press controller bezel into controller housing until bezel tabs securely lock controller
into place
. Plug incubator into outlet power supply.
5
6. Place ON/OFF switch in ON position.

SERVICE GUIDE

SECTION 9
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