American Standard 4A6V0024A1000B Service Facts page 25

Display
Alert
Alert
Assembly
Group
Code
Text
DC HI CO
DC
178 Voltage DC LOW CO
Failure
DC EXC HI LO
4A-V0-SF-1G-EN
Sub-
A/TZONE
State action on
alar-
850/950
occurrence
m
Emergency shutdown.
Control will clear the
0 "Wait"
fault and retry every 5
minutes.
Emergency shutdown.
Control will clear the
1 "Wait"
fault and retry every 5
minutes.
DC Voltage Hi Lockout
has occurred 10 times
consecutively. Control
2 Err 178.02
will clear the fault and
retry every 5 minutes.
V V a a r r i i a a b b l l e e S S p p e e e e d d A A l l e e r r t t C C o o d d e e s s
Alert
State action on
Description
clearance
DC bus voltage is
Resume normal
greater than
operation
480VDC
Resume normal
DC bus voltage is
operation
less than 220VDC
Control will clear
DC Bus excessive
fault when
over voltage after
condition no longer
10 consecutive 5
exists (DC bus
minute cutouts
voltage is less than
(178.00)
480VDC).
Possible Cause
PFC hardware failure.
Run Drive Diagnostic
Test to verify failure.
Call for tech support,
record failure mode
for warranty
claimbefore replacing
Drive. This error can
occur after a power
disconnect.
Low line voltage.
Verify supply voltage
is between 187VAC
and 253VAC.This
error can occur after a
power disconnect.
PFC hardware failure.
Run Drive Diagnostic
Test to verify failure.
Call for tech support,
record failure mode
for warranty
claimbefore replacing
Drive. This error can
occur after a power
disconnect.
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