Ac; Variable Capacity Control - Johnson Controls Hx 3 S1-THXU430W Installation Manual

5407934-UIM-C-1119
TABLE 19: AC
Fault (Displayed Text) Description
OUTDOOR: HPS LOCK-
OUT
OUTDOOR: CONTROL
FAILURE
OUTDOOR: LPS LOCK-
OUT
OUTDOOR: LOW VOLT-
AGE(< 16 VAC)
OUTDOOR: COMPRES-
SOR MISWIRE
OUTDOOR: Y2 W/O Y1-
SOFT LOCKOUT
OUTDOOR: HPS OPEN
W/O COMPRESSOR
OUTDOOR: LOW VOLT-
AGE(< 19 VAC)
OUTDOOR: AMBIENT
SENSOR SHORTED
OUTDOOR: AMBIENT
SENSOR OPEN
TABLE 20: Variable Capacity Control
Fault (Displayed Text)
OUTDOOR: HPS SOFT LOCK-
OUT-NORMAL
OUTDOOR: HPS HARD LOCK-
OUT-NORMAL
OUTDOOR: HPS SOFT LOCK-
OUT-DEFROST
OUTDOOR: HPS HARD LOCK-
OUT-DEFROST
54
System is in high pressure switch lock-
out
Control failure
System is in low pressure switch lock-
out
Low voltage (below 16.0 VAC) stopped
current relay outputs
Compressor contactor miswire
Y2 present without Y1
HPS is open with no call for compressor Efficiency
Low voltage (below 19.2 VAC) prevent-
ing further relay outputs
Outdoor ambient temperature sensor
failure (shorted)
Outdoor ambient temperature sensor
failure (open)
Description
High pressure switch lock-
out. The last mode of opera-
tion was normal compressor.
High pressure switch lock-
out. The last mode of opera-
tion was normal compressor.
High pressure switch lock-
out. The last mode of opera-
tion was defrost.
High pressure switch lock-
out. The last mode of opera-
tion was defrost.
Johnson Controls Ducted Systems
Category
Critical
Critical
Critical
Critical
Critical
Efficiency
Warning
Warning
Warning
Category
Critical
Critical
Critical
Critical