American Standard 4A6V8024A1000B, Service Facts

Page: 34 / 76

34 4A-V8-SF-1G-EN
Alert
Code
Alert
Group
Display
Assembly
Text
Sub-
alar-
m
A/TZONE
850/950
State action on
occurrence
State action on
clearance
Alert
Description
Possible Cause
188
Voltage
VPOS High
VPOS HIGH 8 Err 188.08 Shutdown
Cycle Power to
clear hard lockout
condition
Internal Error
Cycle Power. If error
does not clear, call for
tech support, record
failure mode for
warranty claim before
replacing Drive.
Voltage
VCC Low
VCC LOW 9 Err 188.09 Shutdown
Cycle Power to
clear hard lockout
condition
Internal Error
Cycle Power. If error
does not clear, call for
tech support, record
failure mode for
warranty claim before
replacing Drive.
Voltage
VCC High
VCC HIGH 10 Err 188.10 Shutdown
Cycle Power to
clear hard lockout
condition
Internal Error
Cycle Power. If error
does not clear, call for
tech support, record
failure mode for
warranty claim before
replacing Drive.
189
Control
Board
Tempera-
ture High
BRD TEMP DER 0
N/A
Compressor speed
Derated
Control must clear
the flag when this
condition no longer
exists.
Compressor
Actual speed not
equal to
compressor
requested speed
Limit compressor
RPM.
High ambient
conditions,
recirculation
discharge air, blocked
coil, sensor
calibration.
BRD TEMP CO 1 “Wait”
Shutdown and retry
after 5 minutes
Resume normal
operation
Control board
temperature is
high. Shutdown
and retry after 5
minutes.
High ambient
conditions,
recirculation
discharge air, blocked
coil, sensor
calibration.
Local
Unit Bus
Fault1
UNIT BUS FLT 1
CDA COM ERR
0
N/A
IPC3 communication
link is not active or the
Node ID is not
configured
No bus manager or
IPC3 bus time out
CDA is configured
OR OD starts
communicating on
IPC3
No information to
or from
technician
interface. Test
modes, monitor,
alerts and config
menus lost.
Loss of
communication
between IVSC and
CDA. Check wire
harness and
connections between
IVSC plug J2 and
CDA.
Local
Unit Bus
Fault2
UNIT BUS FLT 2
CDA COM BUSY
1
N/A
The content provider is
not responding, i.e. no
acknowledgement
message from content
provider even after
retries
CDA starts
responding.
No information to
or from
technician
interface. Test
modes, monitor,
alerts and config
menus lost.
IVSC or CDA could be
at fault. When
system operates as
expected, the CDA
has most likely failed.
Local
Keypad
Error
CDA will stay
on same
screen till
timeout and
then jump to
default screen
2
N/A
A key/keys are
continuously pressed
for more than one
minute
Key/keys are
released
A key/keys are
continuously
pressed for more
than one minute.
Key(s) were held
down for too long or
there is a stuck key.
V Va arriia ab blle e S Sp pe ee ed d A Alle errtt C Co od de ess