American Standard 4A6V8024A1000B, Сервисные данные

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4A-V8-SF-1G-EN 23
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
80
High
Pressure
Monitor
Fault
HP SHORT LO 0 “Wait”
5 min of compressor
lockout and send
“WAIT ”to thermostat
Restart with
reduced capacity.
(Capacity reduced
by 1/5 with each
occurrence)
High pressure
switch has
tripped resulting
in a High Pressure
Short Lock Out.
(HPCO limit =
650psig)
Overcharged.
Cooling Mode:
Outdoor Fan Failure,
clogged coil,
recirculation,
excessive high
ambient, non
condensable.
Heating Mode:
Indoor Fan Failure,
clogged coil, non
condensable.
80
High
Pressure
Monitor
Fault
HP HARD LO 1 Err 80.01
Lockout compressor
operation until power
cycle, No system
operation
Can be cleared only
on power cycle.
After power cycle,
the compressor
shall resume
normal operation.
6 High Pressure
Short Lock Out
events have
occurred
resulting in a High
Pressure Hard
Lock Out. (High
Pressure Limit =
650psig)
Overcharged.
Cooling Mode:
Outdoor Fan Failure,
clogged coil,
recirculation,
excessive high
ambient, non
condensable. Heating
Mode: Indoor Fan
Failure, clogged coil,
non condensable.
HP RED RPS 2 “Wait”
On restart, after short
lockout, compressor
will operate at reduced
capacity and this alert
is declared. (Message
on Tstat informing of
reduced capacity)
Note: Recover reduced
capacity with each 2 hr
run time window
without an HPCO trip.
Normal operation
resumes.
High Pressure trip
point has been
exceeded and a 5
minute time out
has been
enforced. Restart
is allowed but
with reduced
capacity.
Overcharged.
Cooling Mode:
Outdoor Fan Failure,
clogged coil,
recirculation,
excessive high
ambient, non
condensable.
Heating Mode:
Indoor Fan Failure,
clogged coil, non
condensable.
88
Ground
fault
GND FAULT LO 1 Err 88.01
Emergency shutdown.
Drive will protect itself.
Can be cleared only
on power cycle.
After power cycle,
the compressor
shall resume
normal operation.
Grounding issue
from output of
the drive. If the
sum of all three
currents exceeds
10 amp to
ground
Burnt winding, faulty
current sensor,
internal board short,
pinched compressor
lead (shorted). Run
Drive Test.
(GoTo “Compressor
Verification”
troubleshooting flow
chart)
90
Communi-
cation
Busy Fault
SYS COM BUSY 2 Err 90.02
CLII bus must go idle.
Continue to operate
normally
Resume normal
operation Communication
busy R & B to thermostat
reversed polarity
91
Communi-
cation
Fault
SYS COM ERR 2 Err 91.02
Shutdown if Heat/Cool
demand message not
received for 3
reporting intervals.
Resume normal
operation Loss of Heat/Cool
demand message
Open/Shorted Data
line Check for
reversed polarity
NO SYS CLK 3 Err 91.03 Shutdown
Resume normal
operation
Loss of Bit Master
Bit Master Control
Fault
106
External
Shutdown
Fault
EXT SW OPEN 1 “Load Shed”
Compressor cooling
operation shall not be
allowed.
Resume normal
operation. Cooling
operation allowed.
External
shutdown switch
is Active and
input at T3 to T4
is open
External Load Shed
device is active with
external switch
configured to Active
and input at T3 to T4
is open
V Va arriia ab blle e S Sp pe ee ed d A Alle errtt C Co od de ess