American Standard 4A6V0024A1000B Service Facts page 26

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
Display
Alert
Alert
Assembly
Group
Code
Text
REC TEMP DER
REC T EX DER
REC TEMP LO
Power
Module
179 Tempera-
ture
Failure
INV TEMP DER
INV T EX DER
INV TEMP LO
HI PWR DER
Supply
180
Voltage
Failure
LOW VOLT CO
26
Sub-
A/TZONE
State action on
alar-
850/950
occurrence
m
Compressor speed
N/A
0
Derated.
Compressor speed
Derated. This alert
shall be an indication
1 Err 179.01
of an extended
Derated performance.
Emergency shutdown
2 Err 179.02
Compressor speed
3 N/A
Derated.
Compressor speed
Derated. This alert
shall be an indication
4 Err 179.04
of an extended
Derated performance.
Emergency shutdown
5 Err 179.05
Compressor speed
N/A
0
Derated.
Emergency shutdown.
Control will clear the
2 Err 180.02
fault and retry every 5
minutes.
Alert
State action on
Description
clearance
Rectifier
Ramp up to
temperature
demand speed
greater than the
(normal operation).
Derate threshold
Rectifier
temperature
greater than the
Ramp up to
Derate threshold
demand speed
and the system is
(normal operation).
being Derated for
an extended
period of time
Can be cleared only
Rectifier
on power cycle.
temperature
After power cycle,
greater than the
the compressor
shutdown
shall resume
threshold
normal operation.
Inverter
Ramp up to
temperature
demand speed
greater than the
(normal operation).
Derate threshold
Inverter
temperature
greater than the
Ramp up to
Derate threshold
demand speed
and the system is
(normal operation).
being Derated for
an extended
period of time
Can be cleared only
Inverter
on power cycle.
temperature
After power cycle,
greater than the
the compressor
shutdown
shall resume
threshold
normal operation.
Low supply
voltage and/or
high power
Ramp up to
output from Drive
demand speed
-compressor
(normal operation).
running at a
reduced RPM
(Derate)
Resume normal
Supply voltage is
operation
less than 175VAC
Possible Cause
High Load condition,
heat sink
performance loss
(check thermal
grease, cold plate
torque)
High Load condition,
heat sink
performance loss
(check thermal
grease, cold plate
torque) possible
Drive hardware
failure (Run Drive
diagnostics)
High Load condition,
heat sink
performance loss
(check thermal
grease, cold plate
torque) possible
Drive hardware
failure (Run Drive
diagnostics) Call for
tech support, record
failure mode for
warranty claim before
replacing Drive.
High Load condition,
heat sink
performance loss
(check thermal
grease, cold plate
torque)
High Load condition,
heat sink
performance loss
(check thermal
grease, cold plate
torque) possible
Drive hardware
failure (Run Drive
diagnostics)
High Load condition,
heat sink
performance loss
(check thermal
grease, cold plate
torque) possible
Drive hardware
failure (Run Drive
diagnostics) Call for
tech support, record
failure mode for
warranty claim before
replacing Drive.
Maximum power is
reduced with line
voltage less than
200VAC. High load
conditions,
recirculation, dirty
coils, low airflow
Supply voltage is less
than 175VAC
4A-V0-SF-1G-EN