American Standard 4A6V0024A1000B Service Facts page 33

Display
Alert
Alert
Assembly
Group
Code
Text
Voltage
VPOS HIGH
VPOS High
Voltage
188 VCC LOW
VCC Low
Voltage
VCC HIGH
VCC High
BRD TEMP DER
Control
Board
189
Tempera-
ture High
BRD TEMP CO
Unit Bus UNIT BUS FLT 1
Local
Fault1 CDA COM ERR
Unit Bus UNIT BUS FLT 2
Local
Fault2 CDA COM BUSY
CDA will stay
on same
Keypad screen till
Local
Error timeout and
then jump to
default screen
4A-V0-SF-1G-EN
Sub-
A/TZONE
State action on
alar-
850/950
occurrence
m
8 Err 188.08 Shutdown
9 Err 188.09 Shutdown
10 Err 188.10 Shutdown
Compressor speed
N/A
0
Derated
Shutdown and retry
1 "Wait"
after 5 minutes
IPC3 communication
link is not active or the
Node ID is not
N/A
0
configured
No bus manager or
IPC3 bus time out
The content provider is
not responding, i.e. no
acknowledgement
N/A
1
message from content
provider even after
retries
A key/keys are
continuously pressed
2 N/A
for more than one
minute
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
Cycle Power to
clear hard lockout Internal Error
condition
Cycle Power to
clear hard lockout Internal Error
condition
Cycle Power to
clear hard lockout Internal Error
condition
Compressor
Actual speed not
Control must clear
equal to
the flag when this
compressor
condition no longer
requested speed
exists.
Limit compressor
RPM.
Control board
temperature is
Resume normal
high. Shutdown
operation
and retry after 5
minutes.
No information to
or from
CDA is configured
technician
OR OD starts
interface. Test
communicating on
modes, monitor,
IPC3
alerts and config
menus lost.
No information to
or from
technician
CDA starts
interface. Test
responding.
modes, monitor,
alerts and config
menus lost.
A key/keys are
Key/keys are continuously
released pressed for more
than one minute.
Possible Cause
Cycle Power. If error
does not clear, call for
tech support, record
failure mode for
warranty claim before
replacing Drive.
Cycle Power. If error
does not clear, call for
tech support, record
failure mode for
warranty claim before
replacing Drive.
Cycle Power. If error
does not clear, call for
tech support, record
failure mode for
warranty claim before
replacing Drive.
High ambient
conditions,
recirculation
discharge air, blocked
coil, sensor
calibration.
High ambient
conditions,
recirculation
discharge air, blocked
coil, sensor
calibration.
Loss of
communication
between IVSC and
CDA. Check wire
harness and
connections between
IVSC plug J2 and
CDA.
IVSC or CDA could be
at fault. When
system operates as
expected, the CDA
has most likely failed.
Key(s) were held
down for too long or
there is a stuck key.
33