507769-05G / 31-5000656
Page 39 of 55
Issue 2223
Red LED Flash Code
2
Diagnostic Codes / Status of Furnace
Off
No power to control or control hardware fault detected
Heartbeat
1
Normal operation - idle, continuous fan, cool
Continuous Rapid Flash Call for heat / burner operation
1 Flash
Reverse line voltage polarity
2 Flashes
Improper earth ground
3 Flashes
Burner failed to light, or lost flame during heat demand
4 Flashes
Low flame signal - check flame sensor
5 Flashes
Soft lockout - burner failed to light, exceeded maximum number of retries or recycles
6 Flashes
Not used
7 Flashes
Primary or Secondary limit open or soft lockout mode - limit switch open longer than 3 minutes
8 Flashes
Rollout switch open
9 Flashes
Pressure switch failed to close or opened during heat demand
10 Flashes
Soft lockout - Pressure switch opened 5 times during one heat demand
11 Flashes
Pressure switch stuck closed prior to activation of combustion air inducer
12 Flashes
Flame sensed without gas valve energized
13 Flashes
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 sec.
Table 12.
Diagnostic Codes for 103217-03 Control
Red LED Flash Code
2
Diagnostic Codes / Status of Furnace
Off
No power to control or control hardware fault detected
On
Board Fault Detected
Fast Heartbeat
3
Call for Heat / Burner Operation
Slow Heartbeat
1
Normal Operation – Idle, Continuous Fan, or Cool
1 Flash
2
Reverse Line Voltage Polarity or Phasing of 120V power
2 Flashes
2
Improper earth ground
3 Flashes
2
Burner failed to light, or lost flame during heat demand
4 Flashes
2
Low flame signal - check flame sensor
5 Flashes
2
Soft lockout – burner failed to light, exceeded maximum number of retries/recycles, 1 hour lockout
6 Flashes
2
Not used
7 Flashes
2
Primary or Secondary limit switch open or soft lockout mode – Limit Switch open longer than 3 minutes
8 Flashes
2
Rollout switch open
9 Flashes
2
Pressure switch failed to close or opened during heat demand
10 Flashes
2
Soft lockout - Pressure switch opened 5 times during one heat demand
11 Flashes
2
Pressure switch stuck closed prior to activation of combustion air inducer
12 Flashes
2
Flame sensed without gas valve energized
13 Flashes
2
Low line voltage
1
A slow heartbeat is indicated by 1 sec on / 1 sec off. It is used for idle, continuous fan and cool modes.
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 2 sec, then repeats.
3
A fast heartbeat is indicated by 1/2 sec on / 1/2 sec off. It is only used during a heat call.
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 sec.
Table 13.
Diagnostic Codes for 107163-01 Control