Unit installation

30
Table 6 – ComfortLink Alarm Codes
ALARM
OR
ALERT
NUMBE R
DE SCRIPTION
ACTION TAKEN B Y
CONTROL
RESET
METHOD
PROBABLE CAUSE
T051
Compressor A1 Safety Trip
Add S trike for Circuit A Automatic
High--- pressure switch open. Compressor internal protection
open. Wirin g er r or
Service Test - -- Compressor A1 Safety T rip
Compressor A1 Detected After Tur n off
T urn off all compressors Automatic Welded contactor
Ser vic e Test --- Compres sor A1 Detect ed After
Turno f f
T064
Circuit A Saturated Condensing Temp Thermistor
Failure
Limited Diagnostic Automatic
Faulty , shorted, or open thermistor caused by wiring error or
loose con n ec t ion.
T066
Circuit A Saturated S uction Temperature
Thermistor Failure
No Cir cu it A Cooling Automatic Circuit A Suction transducer internally forced inactive
T073 Ou t d oor Air Tem pe r at u re Thermistor Failu r e No cooling with econ omizer Automatic
Faulty , shorted, or open thermistor caused by wiring error or
loose con n ec t ion.
T074 Space Temperature Thermistor Failure
If U.CTL = 3, then no
heating or cooling
Automatic
Faulty , shorted, or open thermistor caused by wiring error or
loose con n ec t ion.
T075 Supply Air Temperature Thermistor Failure
No cooling with ec on omizer
and No adaptive
compressor staging
Automatic
Faulty , shorted, or open thermistor caused by wiring error or
loose con n ec t ion.
T076 Return Air Thermistor F ailure
If RAT.S = Y es, then no
differential Dry Bulb control
Automatic
Faulty , shorted, or open thermistor caused by wiring error or
loose con n ec t ion.
T077 Spac e Relative Humidity S en sor Failure
If RH.S = Yes, then no
indoor h umidity con t r ol
Automatic
Faulty,shorted,oropensensorcausedbywiringerroror
loose con n ec t ion.
T092 Circuit A Suction Pressure T ransducer F ailure Lockout Circuit A Manual
Faulty t r an sducer, fau lt y 5--- V power su pp ly, or loose
connection
T102 Compressor Current Sensor Failure No Cir cu it A Cooling Automatic
Miswired, bad Cur r ent board, or no board ins talled bu t
configured for it.
T110
Circuit A L oss of Ch arge
Lockout Circuit A Manual Low refrigerant or faulty suction pressure transducer
Service Test - -- Circuit A Loss of Charge
T126
Circuit A High Discharge Pressure
Shutdown Circuit A Automatic
An overc h ar ged system, high outdoor am bien t tem per at u r e
coupled with dirty outdoor c oil, plugged filter drier, or a faulty
high--- pressure switch.
Service Test --- Circuit A High Discharge Pressure
T133
Circuit A Low Refrigerant Pressure
Add S trike for Circuit A Automatic
Low refrigerant ch ar ge , dirt y filters , evapor at or fan tur n in g
backw ar d s , loose or broken fan belt, plugge d filter drier,
faulty transducer , excessively cold return air , or stuck open
economizer when the ambien t tem p er atu r e is low.
Service Test --- Circuit A Low Refrigerant
Pressure
T143
Circuit A Failure To Pressurize
Add S trike for Circuit A Automatic Wiring causing reverse rotation or faulty compressor
Service Test --- Circuit A F ailure to Pressurize
T153 Real Timec loc k Har dw are F ailu r e
No time and date sch edu le
oper at ion
Automatic No time/dat e config u r e d, soft w ar e failur e, or MBB failu re
A154 S er ial EEPRO M Har d w ar e Failu r e Unit Shut down Automatic Softw ar e failur e or MBB failure
T155 Serial EEPROM Storage Failure Error Unit operation errors Automatic Softwar e failur e or MBB failu r e
A156 Critical Serial EEPROM Storage Fail Error Unit Shutdow n Automatic Softwar e failur e or MBB failure
A157 A/D Har dw are F ailu r e Un it Shut down Automatic Softwar e failur e or MBB failu r e
A163 Cir c u it A Down Due t o Failur e Lockout Circuit A Manual Circ u it has 3 str ik es or has been locked out by an ot h er alarm
Service Test --- Circuit A Down Due to Failure
T173
Loss of comm unication with the Energy
Management Module
No action Automatic MBB S oft w ar e failur e, reload softw are or replac e board
T175 Loss of communication with VFD Unit Shut down Automatic
Com m unication c on n e c t ion bad or mis wired, mis c onfigured
VFD.
T179
Loss of commu nication with the Economizer
Control Board
No economizer operat ion Automatic
Communication wiring problem with ECB or faulty MBB or
ECB
T180
Loss of commu nication with the Economizer
Actuator
No economizer operat ion Automatic Communication wiring problem with actuator .
A200 Linkage Timeout Error --- Comm Failure
No Linkage Operation fall
back to local SPT
Automatic
Receiv ed a t able wr it e from Linkage b efor e, now not
rec eiv in g any link age com mands
A404 Fire Shutdown Unit Shu t down Automatic Smoke detected by smoke detect or
T408 Dirt y Air Filter Alert Gen er at ed Automatic Dirty Filter
T409
Fan Status Switch O N, fan commanded off
If IDF.F = Y es, then Unit
Shutdown
If IDF.F = YES,
then Manual,
oth er wise
automatic
Bad F an Status Switch. Configuration incorrect.
Fan Status Switch OFF, fan comm anded on
If IDF.F = Y es, then Unit
Shutdown
If IDF.F = YES,
then Manual,
oth er wise
automatic
Trip ped Cir c u it Break er. Broken belt. Bad in door fan m otor.
Configuration incorrect. Bad fan s tatus switch.
T410
R- -- W1 Jumper Not Installed in Space Temp
Mode
Unable to r u n heat Automatic Missing jumper wire
R- -- W1 Jumper Must Be Installed to Run Heat In
Service Test
Unable to Test Heat Outp u t s Au tomatic Missing jumper wire
T411
Th er mostat Y2 Input Ac t iv ated wit h ou t Y1
Activated
Run unit as if Y2 and Y1 are
On
Automatic Bad Thermostat or Thermostat Wiring
T412
Th er mostat W2 Input Act iv at ed with ou t W1
Activated
Run unit as if W2 and W1
are On
Automatic Bad Thermostat or Thermostat Wiring
T413
Thermostat Y and W Inputs Activated
Sim u lt an eou s ly
Rununitinmodeactivated
firs t
Automatic Bad Thermostat or Thermostat Wiring
T414
Economizer Dam p er Ac t uator Out of Calibration Alert Gen er at ed Automatic
Calibrate economizer (E.CAL ). If problem still exis t then
determine wh at is limit ing ec on om iz e r r otat ion.
Economizer Dam p er A c t u at or Torq u e Abov e
Load Limit
Alert Gen er at ed Automatic Act u at or load too high. Check dam per load .
Economizer Dam p er Actuator Hunting
Excessively
Alert Gen er at ed Automatic Damper position changing too quickly .
Economizer Damper Stuck or Jammed Alert Gen er at ed Automatic
No economiz er m otion . Chec k damp er blades , gears , and
actuator.
Economizer Dam p er Ac t u at or Mec h anical Failure Alert Gener ated Automatic Check actuat or and replac e if n ecessary.
Economizer Dam p er Actuator Dir ec t ion S w it c h
Wron g
Alert Gen er at ed Automatic Act u at or direction con t r ol sw it c h ( C CW, CW) wr on g .
T415 IAQ Input Out of Range No IAQ Operations Automatic Bad s ensor, bad w iring, or sens or c on figu red inc orrectly.
T416 OAQ Input Out of Range No OAQ Operations Automatic Bad s en sor, bad wir ing, or s en sor c on fig u r ed inc or r e c tly.
A420 Su pply VFD Fault Unit Shut down Automatic VFD fault occurred, review VFD faults.
LEGEND:
ECB ---Economizer Control Board IGC--- Integrated Gas Controller MBB --- Main Base Board OAT --- O u t d o o r --- A i r T h e r m i s t o r
48/50LC