2-Stage Furnace - Johnson Controls Hx 3 S1-THXU430W Installation Manual

5407934-UIM-C-1119
TABLE 17: 2-Stage Furnace
Fault (Displayed Text) Description
FURNACE: FLAME
W/OUT POWER
FURNACE: LIMIT/ROLL-
OUT OPEN
FURNACE: LIMIT/ROLL-
OUT OPEN 15 MIN
FURNACE: PRESSURE
SWITCH LOCKOUT
FURNACE: SUPPLY PWR
REVERSED
FURNACE: GAS VALVE
CIRCUIT SHORT
FURNACE: LIMIT/ROLL-
OUT OPEN 5 MIN
FURNACE: NO MODEL
PLUG
FURNACE: CONTROL
FAILURE
FURNACE: PRESSURE
SWITCH OPEN
FURNACE: IGNITION
FAILED
FURNACE: MULTI FLAME
DROPOUTS
FURNACE: PRESSURE
SWITCH CLOSED
FURNACE: 2S PRES-
SURE SWITCH OPEN
FURNACE: FLAME ROD
AGE WARNING
FURNACE: Y WITHOUT G Y thermostat demand without a G
52
Flame sensed with gas valve off
Limit/Rollout switch open
Limit/Rollout switch open for more than
15 minutes
Pressure switch cycle lockout
Incorrect line voltage polarity
Gas valve circuit shorted
Limit/Rollout switch open from 5 min-
utes to 15 minutes
ID plug is missing or not connected
properly
Control failure
Pressure switch open with inducer on
Lockout due to failed ignition
Lockout due to too many flame drop-
outs
Pressure switch closed with inducer off Efficiency
Second-stage pressure switch open
with high inducer on
Flame rod warning
Johnson Controls Ducted Systems
Category
Critical
Critical
Critical
Critical
Critical
Critical
Critical
Critical
Critical
Critical
Critical
Critical
Efficiency
Efficiency
Status