Dexter Laundry A Series Service Procedures And Parts Data

Troubleshooting
F15
Fault# Description Customer Action
The variable frequency drive (VFD)
senses that the internal voltage is too
high. The source of the problem can
originate from two different areas.
Area 1: The input voltage can be too
high, or there may be a high level of
electrical noise.
Area 2: The motor can be generating a
voltage that is acting like an input to the
VFD output motor terminals.
Step 1: Measure the supply voltage to the VFD on
the L1, L2 (or N), and L3 (if connected to three phrase
power). the supply voltage should be from 187 to
264 VAC or 108 to 132 VAC for a 120 VAC VFD.
Also make sure the supply wires on L1, L2 (or N) and
L3 (if connected to three phase power are securely
connected.
Step 2: Check the braking resistor connections at the
VFD. The terminal screws should be tight. Once of the
braking resistor wires should be connected to terminal
B2.
Step 3: Measure each braking resistor separately to
make sure they are the correct resistance. (200 for 1
and 2 Hp VFD and 160 for 3 Hp VFD).
Step 4: If you have a 240 VAC, high leg voltage supply,
try disconnecting the high leg. If this cures the problem,
either leave the high leg disconnected, connect a
transient voltage surge suppressor (with some form
of fi ltering) at the voltage supply panel, connect a line
choke on the high leg or install a VFD fi lter.
F16 The temperature sensor inside of the
variable frequency drive detects that
the internal temperature is too high.
Step 1: Make sure the cooling fi ns on the VFD heatsink
and the ventilation louvers on the VFD cooling fan cover
are clean.
Step 2: Start a washer cycle and make sure the VFD
cooling fan operates after the cylinder starts turning.
F17 Overload of the drive or motor (Check drive fault code before powering down). Check the
washer motor to ensure it turns freely. Check the wiring
for loose connections to the drive and motor. Measure the
braking resistor values. Check for damaged motor wires.
Check V-Belt tension and adjust to 1” defl ection at center.
F18 Ground Fault to the drive
Check VFD fault code before turning off power. Check
the wiring connections to the drive and motor. Check
the ground wiring of the drive, motor and incoming
connection to ensure a proper ground is present. Check
for damaged motor wires.
Troubleshooting Machine Fault Errors (Displayed on front of washer)
38

Dexter Laundry A Series Specifications

General

Brand	Dexter Laundry
Model	A Series
Category	Washer
Language	English