29
IGNITION CONTROL DIAGNOSTIC INDICATOR CHART
(SINGLE STAGE MODELS ONLY)
Light Signal
Refer to Abnormal Heating or Cooling Operation Sections of this Manual
Off
Internal Control Failure
1 Flash
External Lockout
2 Flashes
Pressure Switch Stuck Open
3 Flashes
Pressure Switch Stuck Closed
4 Flashes
Thermal Protection Device Open
5 Flashes
Flame Detected with Gas Valve Closed
6 Flashes
Short Cycle Compressor Delay (Cooling Only)
0 15 22 45 52 0 29 120, 135,150
Seconds
Gas Valve
Igniter
Thermostat
100 %
Circulator
Blower
Induced
Draft
Blower
HEATING TIMING CHART
ON
OFF
ON
OFF
OFF
ON
ON
OFF
Circulator
Blower
Outdoor Fan
and
Compressor
Thermostat
ON
COOLING TIMING CHART
100%
OFF
ON
OFF
ON
OFF
