Symptom Diagnostic Test Resolution
▪ L1 to ground = 115 VAC
▪ N to ground = 0 VAC
▪ L1 to N = 115 VAC
Check voltage at the power cable:
▪ L1 to ground = 115 VAC
▪ N to ground = 0 VAC
▪ L1 to N = 115 VAC
Replace or repair the electrical connector or wires.
Check voltage at the three-pin connector in the
electrical box.
▪ Pin 1 to pin 2 =115 VAC
▪ Pin 2 to pin 3 =0 VAC
▪ Pin 1 to pin 3 =115 VAC
Replace or repair the electrical connector or wires.
Check voltage at the power board: Pin 1 to pin 2 =115
VAC
Replace or repair the connector from the electrical box
to the power board.
Check for 115 VAC at terminal block in electrical box.
Replace or repair the connector from the power board
to the electrical box.
Problem with internal
blower motor.
Note: Perform “Blower
motor does not run at any
speed” checks after these
checks if needed. The
internal blower will need
to be removed.
Disconnect the internal blower connector from the
blower. Check pin 4 to pin 5 for 115 VAC on the hood
side of the connector.
Replace the blower motor harness.
On the motor side of the connector, ohm out:
▪ Pin 4 to pin 5
▪ Pin 4 to motor case
▪ Pin 5 to motor case
If reading open pin 4 to pin 5, or continuity pin 4 or pin
5 to motor case, verify it is not the blower motor
harness, then replace the blower motor.
Problem with external/
inline blower motor.
Note: Perform “Blower
motor does not run at any
speed” checks after these
checks if needed.
On the motor side of the terminal block, disconnect
the external/inline blower motor wires. Ohm out
between the wires. Ohm each wire to ground.
If reading open between blower wires, or continuity
from either blower wire to ground, verify the wiring
between the terminal block and blower motor is good.
If the wiring is good, replace the external/inline blower.
Blower motor runs, but
not at all four speeds.
This failure can be caused by a failure of the triac on
the power board, or by a touch control failure. At this
time, there is no test to determine where the failure is.
Replace the power board or touch control.
Hood does not move
enough air.
Verify the duct run is the correct size, including:
▪ Wall/roof cap is correct.
▪ No reduction in size at any point.
▪ Damper is installed correctly.
▪ No excessive elbows.
▪ No excessive length.
▪ No air box used.
Correct the duct issue.
Blower motor is not changing speeds.
▪ For internal blowers, remove the ducting above.
▪ For inline blowers, remove the ducting on the inlet
and outlet.
▪ For external blowers, remove the inlet ducting.
Note: Restrictions in the ducting can prevent an
audible speed change.
If no speed change is noticed, see “Blower motor
runs, but not at all four speeds.” If there is a speed
change, review the ducting again for restrictions.
Filters are dirty. Remove the filters to test, then clean the filters.
Insufficient make-up air. Open an outside door or window to test.
Wolf V-Series Cooktop Hoods Service Manual
service.subzero.com
825309 REV. B
12
To Next Page
Loading...
