American Standard 4A6V0024A1000B Service Facts page 23

Display
Alert
Alert
Assembly
Group
Code
Text
PM DATA ERR
PM MISSING
PM UNIT ERR
Bad or
114 Missing
PM
PM MEM ERR
PM MISSING
Outdoor
155 EEV Motor EEV MTR ERR
Fault
System
Low
156 LOW CHARGE
Charge
Fault
Unit Bus
159 IPC3 COM ERR
Fault
Outdoor
EEV Valve
EEV OPEN ERR
Migrated
Open
164
Outdoor
EEV Valve
EEV CLSE ERR
Migrated
Closed
Low
165 Superheat LO SUPERHEAT
Error
Low
166 Superheat LO SUPERHEAT
Error
Key fault
172 KEY FAULT
Suction
Pressure
174 SUCT P SENSE
Sensor
Fault
4A-V0-SF-1G-EN
Sub-
A/TZONE
State action on
alar-
850/950
occurrence
m
Continue normal
N/A
0
operation
Continue normal
3 Err 114.03
operation
Continue normal
N/A
4
operation
Shutdown. No
compressor operation
5 Err 114.05
until a good PM is
inserted.
Shutdown. No
compressor operation
6 Err 114.06
until a good PM is
inserted.
Can not run in Heating
mode, Can run in
2 Err 155.02
Cooling mode
High Superheat
N/A
1
occurrences
OD Continue normal
5 Err 159.05
operation
The valve is not
responding to a
change in position,
EEV supposedly
2 N/A
opened fully and no
change to
accommodate
superheat occurred.
The valve is not
responding to a
change in position,
N/A EEV supposedly closed
3
fully and no change to
accommodate
superheat occurred.
Low Superheat
N/A
1
occurrences
Low Superheat with
N/A
1
EEV closed
OD continue normal
operation. CDA shall
quit generating key
1 N/A events and will stay on
same screen till
timeout and then jump
to default screen.
Shutdown and enter a
hard lockout.
Compressor locked out
0 Err 174.00
until power cycle and
requires service call.
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
Continue normal
PM data corrupt
operation
Continue normal PM missing with
operation good local copy
Bad data in PM
Continue normal
with good local
operation
copy
Resume normal Bad data in PM
operation with no local copy
Resume normal PM bad or missing
operation with no local copy
The OD EEV
electric coil has
Power cycle
an open or
intermittent short
circuit.
Superheat Change
occurs and allows
High Superheat
control within the
occurrence of 35
EEV range of
degrees or more
operation.
has been
(Superheat target
detected for more
is 10 degrees +/-
than 60 minutes.
4)
Continue normal
Display Assembly
operation.
communication
Technician interface
error
available
EEV migrated to
open position but
Superheat Change
superheat is not
occurs and allows
at the desired set
control within the
point. Valve is
EEV range of
not responding to
operation
a change in
position.
EEV migrated to
closed position
Superheat Change
but superheat is
occurs and allows
not at the desired
control within the
set point. Valve is
EEV range of
not responding to
operation
a change in
position.
Superheat Change
Low supper heat
occurs and allows
(less than 3
control within the
degrees)has been
EEV range of
detected for more
operation
than 60 minutes
Superheat Change
occurs and allows
EEV valve closed
control within the
and still flooding
EEV range of
operation
Continue normal
Display Assembly
operation.
has a stuck key
Technician interface
available
Power cycle. After Pressure
power cycle, the transducer is
missing, open,
compressor shall
resume normal shorted or out of
operation. range.
Possible Cause
PM Error
PM Error
PM error
PM Error
PM Error
EEV motor coil open
or shorted
System low charge,
liquid line restriction,
sensor calibration
Wire assembly
between Display
Assembly and IVSC
board
Possible stuck valve
or sensor(s) out of
calibration
Possible stuck valve
or sensor(s) out of
calibration
Possible stuck valve,
sensor(s) out of
calibration, low
airflow, overcharge,
check valve leaking.
Possible stuck valve,
sensor(s) out of
calibration, low
airflow, overcharge,
check valve leaking.
Faulty Display
Assembly
Wiring or component
failure. (System
under vacuum or
suction pressure over
500psig)
23