York ZF150 Installation Manual

Also see for Predator ZF078: Technical guide

518674-YIM-C-061062 Johnson Controls Unitary ProductsTable 30: Heat DelayHeatFan OnDelayHeatFan OffDelayRedLED 8RedLED 4RedLED 2RedLED 160 180 On On On On60 90 On On On Off60 60 On On Off On60 30 On On Off Off45 180 On Off On On45 90 On Off On Off45 60 On Off Off On45 30 On Off Off Off30 180 Off On On On30 90 Off On On Off30 60 Off On Off On30 30 Off On Off Off0 60 Off Off On On0 30 Off Off On Off0 10 Off Off Off OnNon-std Non-std Off Off Off OffTable 31: Ignition Control Flash CodesFlashes Fault Conditions CheckSTEADY ON Control Failure ControlHEARTBEAT Normal Operation1 Not Applicable2 Pressure SwitchStuck Closed Pressure Switch3 Pressure Switch FailedTo CloseVenter Pressure SwitchVent Blocked4 Limit Switch Open Main LimitAUX Limit5Flame Present With GasOff First Stage Gas ValveEnergized With W1 OffSecond Stage Gas ValveEnergized With FirstStageGas Valve OffGas Valve6 Ignition LockoutGas FlowGas PressureGas ValveFlame SensorSTEADY OFF No Power Or ControlFailure 24VAC or ControlTable 32: VAV Control Board Flash CodesFlash Codes DescriptionOn Steady This is a Control Failure1 Flash Not Applicable2 Flashes Loss of Communications with UCB3 Flashes Space Sensor Failed4 Flashes SAT Sensor Failed5 Flashes RAT Sensor Failed6 Flashes OAT Sensor Failed7 Flashes OAH Sensor Failed8 Flashes RAH Sensor Failed9 Flashes IAQ Sensor Failed10 Flashes OAQ Sensor Failed11 Flashes APS Switch Failed12 Flashes Limit 2 Switch Open13 Flashes Purge14 Flashes VFD Input Failure15 Flashes Dirty Filter Switch16 Flashes Econ Minimum Position Alarm17 Flashes Space Temp/Time Alarm18 Flashes Water Coil Freeze Stat Alarm19 Flashes SAT Alarm for Cooling20 Flashes SAT Alarm for Heating