icetro ISI-271THS, User Manual

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Replacement of Fan motor
Replacement of 4-way valve
F. Replacing the fan motor
1) Turn off the power of ELCB.
2) Open the back panel cover.
3) Remove the harness from the fan motor.
4) Remove the four screws from the fan motor assembly.
5) Remove the fan motor and the fastening brackets (total of four bolts).
6) Replace the motor with a new one.
7) Assemble the fan motor and the fastening brackets (total of four bolts).
8) Tighten the four screws from the fan motor assembly.
9) Connect the harness to the fan motor.
10) Tighten the screws on the back panel cover.
11) Turn on the power of ELCB.
1) Turn off the power of ELCB.
2) Open the side door.
3) Recover the refrigerant using an adequate vessel.
4) Remove the insulator from the 4-way valve assembly.
5) Remove the harness from the 4-way valve.
6) Remove the solenoid coil from the 4-way valve (1 bolt).
7) Remove the 4-way valve (four brazing points).
8) While purging with nitrogen gas at pressure of 3~4 psig, braze a new 4-way valve.
9) Replace the drier with a new one.
10) Inject nitrogen at pressure of 140 psig and check for leaks with electric leak
detector or soap water.
11) Assemble the solenoid coil connected to the 4-way valve (1 bolt).
12) Assemble the harness on the 4-way valve.
13) Vacuum the system and inject refrigerant.
14) Close the side door.
15) Turn on the power of ELCB.
1. Always install a new drier every time the sealed refrigeration system is opened.
2. Do not replace the dried until after all other repair or replacement has been made.
Install the new drier with the arrow on the drier in the direction of the refrigerant flow
3. When brazing, protect the drier and 4-way valve by using a wet cloth to provent the
drier and 4-way valve from overheating, Do not allow the drier to exceed 250
℉
(121
℃
)
WARING