Alliance Laundry Systems ZWNE8RSN115FW01, Troubleshooting Manual

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Display Description Cause/Corrective Action
Er, Ub
Fatal Unbalance Error Wires to unbalance switch are broken or not connected. Switch
may be stuck closed. Broken spring or unleveuicontrol machine
causing tub to lean on unbalance switch.
Er, Co
Communication Error Check H2 connector on FEC to drive board wire harness for bro-
ken wire or pin not making contact.
Er, id
Board ID Error Incorrect replacement control. Replace FEC or drive board with
the correct part.
Er, bS
Board Shorted Error Relay K1 on drive board is stuck/welded. Try tapping on relay to
free contacts, otherwise replace drive board.
Er, nr
Drive Board Not Ready Hardware failure. Replace drive board if error persists. Unplug
machine to clear this code.
dS
shown on power
up in addition to
software version
number
Dipswitch/Voltage Configuration Error Unexpected supply voltage: Check the harness connections be-
tween the front end control and the drive board. If the front end
control was replaced, set dip switch 1 to the same setting as the
previous control. If reworking the machine to use a different
voltage supply, dip switch 1 setting may need to be changed. If
dip switch 1 setting is changed, power down, power up and try
again. Also check pin H2-7 on the front end control to ensure
good connection between front end control and drive board.
Left Decimal Point
blinking on display
one second on/off Maximum intended speed not reached in
final spin This could be due to an unbalanced load, excessive suds in load,
or too much water left in tub due to slow draining. Open lid or
press any keypad to clear this code.
Display is dim Look for loose pins and damaged wires on harness from front
end control to drive board.
Drive Errors
Ed, 10
Voltage Select Error Wrong input voltage seen at drive board. (120 Volt or 240 Volt)
Dip switch 1 on front end control set wrong. There could possi-
bly be water on drive board (let drive dry out and determine
cause of water). Unpower to clear error. Replace drive board if
error persists.
Ed, 12
Over Voltage AC-Main Input Error Machine voltage is too high. Check supply voltage to the ma-
chine and verify that it is within machine specifications. Unpow-
er to clear error. Replace drive board if error persists.
Ed, 13
Power Fail Dangerous Error The neutral line power input to the machine was seen out of
range. Unpower to clear error. Check for damage in the power
supply harness. Replace power supply harness or drive board if
error persists.
Ed, 21
Over Voltage DC Bus Error Unpower to clear error. Check voltage input to machine. If it
happens only at start of spin, replace motor. Replace drive board
if error persists.
Table 10 continues...
Error Codes
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20 Part No. 204560ENR1