279 92-14)Using the chart in Figure 92-17, what problems can cause both a high superheat and a high subcooling? Liquid Restriction Underfeeding metering device Low Capacity Compressor 92-15)Using the induced draft sequence chart in Figure 92-4, what should be checked if the induced draft fan comes on but the igniter is never energized? Check to see if the vent has the correct draft Check for obstructions in the vent Check the draft pressure switch 92-16)List some resources the air conditioning technician can use to learn about the system operational sequence. Sources of information on the system sequence of operation include the manufacturer’s installation and operation and manuals, unit wiring diagrams, unit charging charts, and general textbooks. 92-17)List some sources the air conditioning technician can use to get system operational data. Sources for the current system operational data include the homeowner, general observation, diagnostic boards, and system performance tests. 92-18)Using Figure 92-7, what should the approximate suction pressure be for an EC015 system operating in heating with an entering water temperature of 50°F and a water flow of 2.8 GPM? 164 – 201 psig 92-19)Why are diagnostic codes not always able to identify the system problem? On board diagnostics can only report issues that it has inputs for. 92-20)Why should service technicians be familiar with company pricing policies?