Merco MHU63SST2N, Руководство по обслуживанию

Страница: 27 / 40

4-5
Section 4 Maintenance
INSTRUCTIONS FOR REPLACING A HEATER PAD
Pad heater probes are located in the heater pad assembly.
NOTE : Failed thermocouples require a heater pad
replacement.
1. Disconnect the power.
2. Remove the four (4) screws that attach the top of the
cabinet
3. Remove the end panels by sliding up and away from
the cabinet.
4. From each side remove nuts attached to the studs of
both end clips.
5. From each side remove the shoulder screw and
standard screws holding aluminum heater plate above
zone.
6. Thermocouple connections are at the top of the IO
board. Mark plugs for reassembly. Pay close attention
to their placement. From both sides of the cabinet
unplug heaters and probes associated with aluminum
plate above zone.
7. Raise heater plate and slide out the insulation under
the plate to gain access to heater pad.
8. Route the power coupling through the cabinet interior.
9. Pull the heater plate out carefully.
10. Flip the aluminum plate over. Peel the old heater pad
off and attach the new one.
11. Reverse the steps to reassemble the cabinet.
INSTRUCTIONS FOR REPLACING A TOUCH SCREEN
1. Disconnect the power.
2. Remove the top of the cabinet.
3. Disconnect any cables or wires from the rear of the touch
screen, marking their position for reassembly
4. Remove and replace the faulty touch screen.
5. Remove the SD card from the failed controller by gently
pushing in on the SD card and releasing until it is SD card is
ejected. The SD card is held in by a spring lock.
6. If the new controller has an SD card in place, remove it and
insert the SD card removed from the failed controller in
previous step and insert with contact down towards the
board. Gently push the SD card into the SD card slot until it
locks in place.
7. Reattach any cables or wires and attach the top of the
cabinet.
8. Reconnect power.
9. Perform a setup by entering the serial, model and store
number into the controller.
INSTRUCTIONS FOR REPLACING A FAN, RELAY,
SWITCH, SPEAKER, POWER SUPPLY OR OTHER
COMPONENTS IN THE ELECTRONICS BOX
1. Disconnect the power.
2. Remove the top of the cabinet.
3. Mark wires and harnesses locations for easy reassembly.
4. Disconnect wires and harnesses.
5. Remove the existing parts.
6. Carefully reattach all wires and harnesses.
7. Replace the cabinet top.
8. Reconnect to power to return to service.