Carrier AquaEdge 23XRV - Page 29

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ALT511 0 4 AUTOMATIC Notify
ALT-511 Process Alert -
Condenser Freeze Cir A
System maintains
CRT(TEMP_CND_ST_A) at or
above the Condenser Freeze
Point subject to ALL of the
following:
• Unit is not in pumpdown
(GENUNIT_STATUS != 11)
• Unit is not in pumpdown
lockout
(GENUNIT_STATUS != 12)
with Condenser Freeze Pro-
tection disabled
(HYDRCFG_cnd_fz_d)
• CRT < Condenser Freeze
Point (34°F); If evaporator
fluid type is set to med or
low brine
(SERVICE1_flui_typ > 0)
this generates an alert
Check condenser pressure
transducer for accuracy. Check
condenser pressure transducer
wiring. Check refrigerant charge.
Check configuration value in
Service configuration.
ALT517 0 0 AUTOMATIC Notify
ALT-517 Process Alert - Low
Discharge Superheat Cir A
Compressor is ON AND running
at least 10 min AND Discharge
Superheat (TEMP_DSH) 
Discharge Superheat low limit
(EXV_STP_dShLStpt) (default
2°F)
Review configurations in in
"Comp A Config". Check oil
level. Check for excess
refrigerant charge.
ALT519 10 10 AUTOMATIC Notify
ALT-519 Process Alert - Low Oil
Pressure Difference Cir A
Oil pressure difference is
between 15 and 18 psid
AND
STARTUP COMPLETE
(4 < GENUNIT_STATUS < 9)
Check oil pump operation,
check oil level, check oil filters,
check for frequent start/stop of
unit which will prevent proper oil
recovery.
ALT521 0 0 MANUAL Notify
ALT-521 Process Alert - Low
Refrigerant Charge Cir A
Compressor is running but not in
ramp loading status AND
Condenser approach
(TEMP_CNDAPP_A) > low
refrigerant charge condenser
approach threshold
(LIMITCFG_rch_cath) AND
Evaporator approach
(TEMP_EVPAPP_A) is 2°F
greater than design approach
(LIMITCFG_ap_dgap)
Check evaporator pressure,
evaporator saturation refrigerant
temp, and evaporator refrigerant
liquid temp. Verify pressure
transducer and thermistor
wiring. Check for low chilled
water supply temperature. Add
charge and check.
ALT523 0 0 MANUAL Notify
ALT-523 Process Alert - Oil
Filter Replacement Cir A
Oil pump control test is active
(only during start verify time)
AND If the oil pressure
differential (PRESSURE_PD) <
alert threshold
(startDiffPressMin) default
startDiffPressMin = 18psig
<15-20 psig>, 2psig hysteresis
ALT525 0 0 MANUAL Notify
ALT-525 Process Alert -
Transducer Calibration Cir A
Compressor is OFF for at least
5 min AND Differences in the
evaporator (PRESSURE_CRP),
condenser (PRESSURE_CRP),
and economizer
(PRESSURE_ECON_P)
refrigerant pressure transducer
readings are greater than the
Trans Calibration Required Limit
(default 2 psig)
Recalibrate transducers.
Replace transducer if calibration
cannot be resolved.
ALT527 0 0 AUTOMATIC Notify
ALT-527 Process Alert - High
Discharge Gas Temp Cir A
Compressor is running AND
Discharge Gas Temp
(TEMP_DGT_A) > Discharge
Gas Temp Alert
(LIMITCFG_dgt_alrt)
Check discharge gas temp
thermistor and wiring. Check for
excessive starts. Check
compressor discharge alert
setting in Limit configuration.
ALT800 2 10 Automatic Notify
ALT-800 - VFD Alert - VFD A1
Loss of Feedback
Table 10 — PIC6 Alert Codes (cont)
CODE
HITS TO
ACTIVATE
HITS TO
RESET
RESET TYPE RESPONSE MESSAGE TRIP CONDITION TROUBLESHOOTING