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Table 10 — Manual Reset Alarm List
SENSORS
See Table 11 for a list of all sensors.
Table 11 — Sensor List
ALARM NAME
(ALARM STATUS SCREEN)
CONDITION/MODE DESCRIPTION
Compressor #1 Stop Alarm/C1 Stop Compressor #1 shut down due to CC1-CS lock out.
High Pressure Switch #1 Stop Alarm/HPS1 Stop Compressor #1 shut down due to HPS1 lock out.
Low Pressure Switch #1 Stop Alarm/LPS1 Stop Compressor #1 shut down due to LPS1 lock out.
Freeze Protection #1 Stop Alarm/FP1 Stop Compressor #1 shut down due to FP1 lock out.
Compressor #1 in HAND Alarm Alarm/C1 Hand Comp. #1 in Hand: C1 current sensor shows “On” but Y1 is “Off”.
Compressor #2 Stop Alarm/C2 Stop Compressor #2 shut down due to CC2-CS lock out.
High Pressure Switch #2 Stop Alarm/HPS2 Stop Compressor #2 shut down due to HPS2 lock out.
Low Pressure Switch #2 Stop Alarm/LPS2 Stop Compressor #2 shut down due to LPS2 lock out.
Freeze Protection #2 Stop Alarm/FP2 Stop Compressor #2 shut down due to FP2 lock out.
Compressor #2 in HAND Alarm Alarm/C2 Hand Comp. #2 in Hand: C2 current sensor shows “On” but Y2 is “Off”.
Exhaust Fan Alarm Alarm/EF Stop
Exhaust Fan Failure; EF commanded on and EF-APS/CS shows no
airflow or current.
Exhaust Fan in HAND Alarm Alarm/EF Hand
Exhaust Fan in Hand; EF commanded off and EF-APS/CS shows airflow
or current.
Supply Fan Alarm Shutdown/SF Stop
Unit shutdown due to Supply Fan failure; SF commanded on and SF-APS/
CS shows no airflow or current.
Supply Fan in HAND Alarm Shutdown/SF Hand
Supply Fan in Hand; SF commanded off and SF-APS/CS shows airflow or
current.
High Supply Duct Pressure Stop Shutdown/High SFDPT Unit shutdown; SF-DPT indicates supply duct static pressure over limit.
Low SAT Alarm Shutdown/Low SAT Unit shutdown due to SAT below low limit set point 40°F.
SAT Sensor Failure Shutdown/SAT Stop Unit shutdown due to SAT sensor value of -60.2°F or 296°F.
NAME DESCRIPTION FACTORY INSTALLED
REPLACEMENT
COMPONENT
PART NUMBER
OAT/RH Outside air temperature and RH Sensor (when ERV not included) Yes 0843P-0587
ECAT/RH
Entering coil air temperature and RH sensor (used in place of
OAT/RH when ERV ordered)
Yes 0843P-0587
SAT/RH Supply air temperature and RH sensor No (Yes on units with no heat) 0843P-0586
OAT/RH
Outside air and return air temperature and RH Sensor (when ERV
included)
Yes 0843P-0583
WExAT
Wheel exhaust air temperature sensor (when ERV with VFD
defrost included)
Yes 0843P-0583
ZS Zone air temperature sensor (optional) No ZS2-CAR
DX LAT1 DX coil leaving air temperature (single stage) Yes 0843P-0619
DX LAT2 DX coil leaving air temperature (dual stage) Yes 0843P-0619
SF-DPT Supply duct pressure transducer (optional) No 0844P-0153
EF-DPT Exhaust space pressure transducer (optional) No 0844P-0154
AMS Air monitoring station (optional) Yes 0843P-0593
SF-APS Supply fan air proving switch Yes 844P-0155
EF-APS Exhaust fan air proving switch Yes 0844P-0155
WM-CS Wheel motor current switch Yes 0874P-0187
CC1-CS Cooling circuit current sensor first stage Yes 0874P-0187
HPS1 High pressure switch first stage Yes 0844P-0177
LPS1 Low pressure switch first stage Yes 0844P-0178
CC2-CS Cooling circuit current sensor second stage Yes 0874P-0187
HPS2 High pressure switch second stage Yes 0844P-0146
LPS2 Low pressure switch second stage Yes 0844P-0151
CFI Clogged filter indicator Yes 0334N-0001A
AMS Airflow monitoring station Yes 0843P-0593
SD Smoke Detector (Duct Mount) No 0845P-0057
COS Condensate Overflow Switch Yes 0843P-0558
CO2 CO
2
Sensor (Duct Mount) No 0844N-0049A
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