STRATUS Multi-Deck Display Case
23
Procedures—Fan removed from the case
1.
Disconnect the fan plug from the case wire harness and inspect the
pins. If they appear bent, straighten them out and reconnect the
plug. If pins are broken, replace the power harness.
2.
Remove the fan side harness plug from the back of the fan. This
is generally best accomplished by placing a thumb under the plug
and applying steady pressure outwards from the fan.
3. Check for liquid in the slot where the harness plugs into the fan. If
any liquid is present, check that the seal around the perimeter of
the slot is completely intact. Replace any fan with a damaged seal.
If the seal is good, completely dry out the slot and the harness pins
before proceeding further.
4. Check the resistance across the L1 & N fan side male pins with
the common lead from the ohmmeter on the N pin. Check the resistance across the speed selection and
L1 pins with the common lead on the L1 pin. Both measurements should have a value of MΩ’s (typically
2-3MΩ). If either reading is zero or infinity, replace the fan.
2. FAN HARNESS PLUG
4. RESISTIVITY
SPEED SELECTION
L1 (LINE)
N (NEUTRAL)
SEAL
5.
If the resistance measurements are good, reconnect the power on the case side of the fan harness and
check that the correct voltage is being applied at the fan side harness pins.
6.
If a problem is found with the voltage at the fan side of the harness, perform a continuity test on each leg of
the harness. Replace the fan if the harness is found to be bad.
7.
If the continuity test is good, check the fan side harness connections for any damage or corrosion to the
female pins in the harness or the male pins in the fan. Replace the fan if any damage or corrosion is seen.
NOTE: If the above checks / changes do not fix the motor issues, the motor should be replaced.
NOTE: Any time the fan side harness connector is plugged back into the fan, be sure to press it all the way down in
order to make a good seal.
