508142-01
Issue 2047
Page 10 of 33
1/4” Quick Connect Terminals
120HUM
Humidifier 120VAC
LINE
120VAC
XFMR
Transformer 120VAC
CIRC
Indoor Blower 120VAC
EAC
Indoor Air Quality Accessory 120VAC
NEUTRALS
Common 120VAC
HUM24
Humidifier 24VAC
3/16” Quick Connect Terminals
COOL
Cooling Tap 24VAC
HEAT
Heating Tap 24VAC
FAN
Continuous Blower 24VAC
PARK (no power) Park terminal for unused speed taps
FS
Flame Sense
24 COM
Common 24VAC
Table 3.
The integrated control is equipped with an LED light for troubleshooting. The diagnostic codes are listed in Table 4 or Table
Red LED Flash Code
2
Diagnostic Codes / Status of Furnace
Off
No power to control or board fault detected
Heartbeat
1
Control powered - displayed during all modes of operation if no errors are detected
1
Reverse Line Voltage Polarity
2
Improper Earth Ground
3
Burner failed to light, or lost flame during heat demand
4
Low Flame Signal - check flame sensor
5
Watchguard - burner failed to light, exceeded maximum number of retries or recycles
6
Not Used
7
Primary or Secondary Limit Open or Watchguard Mode - Limit Switch Open longer than 3 minutes
8
Rollout Switch Open
9
Pressure Switch failed to close or opened during heat demand
10
Watchguard - Pressure Switch opened 5 times during one heat demand
11
Pressure Switch stuck closed prior to activation of combustion air inducer
12
Flame Sensed without gas valve energized
13
Low Line Voltage
1 A ”Heartbeat” is indicated by a ”Slow Flash” - 1 sec on 1 sec off, repeating
2 Error codes are indicated by a ”Rapid Flash” - the LED flashes X times at 1/2 sec on 1/2 sec off, remains off for 3 sec, then repeats
NOTE:
Last 10 error codes are stored in memory including when power is shut off to the unit. - To recall, press and release button,
most recent will be displayed first, LED off for 3 sec, then next error code is displayed, etc. To clear error codes, depress and
hold button longer than 5 seconds.
Table 4.
-02 Control Diagnostic Codes
