Armstrong World Industries 122, 243, 302, 242, 123, 203, 182, 183 United Technologies Model 1097-400-1

UNIT COMPONENTS Magic-Pak: HW/HWC

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Diagnostics (United Technologies 1097-400-1)

The following blower/ignition control board LED codes indicate normal or abnormal operations:

TABLE 5-2	UTech Model 1097 Diagnostic Flash Code
SLOW FLASH		Normal Operation, No Call for Heat
FAST FLASH		Normal Operation, Call for Heat
2 FLASH		System Lockout - Failed to Detect or Sustain Flame
3 FLASH		Pressure Switch Open or Closed
4 FLASH		High Limit or Rollout Switch Open
5 FLASH		Flame Sensed and Gas Valve Not Energized
STEADY		Internal Failure (Micro-controller Failure; Self-check)

United Technologies Model 1097-400-1 (cont.)

Quick Connect Terminal Descriptions

124VAC HOT - from Transformer

2GROUND = 24VAC Return

4CMB BLWR = Combustion Blower (Line Voltage)

5L1 = Line Voltage

9ACB COOL = Air Circulating Blower Cool Speed (Line Voltage)

10ACB HEAT = Air Circulating Blower Heat Speed (Line Voltage)

11UNUSED (Park)

12FLAME = Flame Probe

Molex/Amp Plug-in Description

1Roll-out Switch Return

2Hi Limit Return/Pressure Switch Out

3Gas Valve Common

4Gas Valve Out

5Pressure Switch Return

6Roll-out Switch Out

Thermostat Input

R	24VAC to Thermostat (RED)
G	Manual Fan Input from Thermostat (GREEN)
W	Heat Demand Input from Thermostat (WHITE)
C	Common Ground to Thermostat
Y	SRM-HW/HWC
	Cool Demand Input from Thermostat (YELLOW)

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