Hayward Universal H-Series Low NOx Service/Installation: H150FDN H200FDN H25 - Page 37

37 6. When the thermostat is satisfied and the call for heat ends the control immediately de-energizes the gas valve. Flame is extinguished. 7. The control operates the blower during a 30-second post-purge period. Failure to light - retry: If the first ignition attempt fails during a normal heating cycle the control will make two (2) additional ignition attempts: 1. The control de-energizes the gas valve after the 4-second ignition trial ends. 2. The control operates the blower during a 30-second post-purge period. 3. The control monitors for open contacts at the blower vacuum switch. 4. The control performs a gas valve relay check. 5. A normal ignition sequence resumes with Item #2 in "Heating Mode" (above). If the third ignition trial fails the control enters a safety lockout (or "hard" lockout) after the postpurge period of the third failed trial. 6. The error code "IF" is displayed and the "SERVICE" indicator is illuminated. a. The control automatically resets and clears the "IF" error code without any user intervention after 60 minutes. If there is a call for heat after reset the control will make three (3) trials for ignition. If ignition is not established the control will again enter safety lockout for 60 minutes. This cycle will continue until ignition is established or the call for heat is removed. b. The user can reset the control and clear the "IF" error code by pressing the "MODE" button to move through "STANDBY" and return to the previous mode ("SPA" or "POOL"). Loss of flame - recycle: If flame is established and then lost, the control will make ten (10) attempts at ignition. If flame is lost within ten (10) seconds of ignition the control will respond within 2 seconds. If flame is lost more than ten (10) seconds after ignition the control will respond within 0.8 seconds. 1. The control de-energizes the gas valve and the blower. 2. The control monitors for open contacts at the blower vacuum switch. 3. The control performs a gas valve relay check. 4. A normal ignition sequence resumes with Item #2 in "Heating Mode" (above). 5. If the tenth ignition trial fails the control enters a safety lockout (or "hard" lockout) after the post- purge period of the tenth failed trial. 6. The error code "IF" is displayed and the "SERVICE" indicator is illuminated. a. The control automatically resets after 60 minutes. If there is a call for heat after reset the control will make three (3) trials for ignition. If ignition is not established the control will again enter safety lockout for 60 minutes. If flame is established but is lost the control will make ten (10) attempts at ignition. This cycle will continue until ignition is established or the call for heat is removed. b. The user can reset the control and clear the "IF" error code by pressing the "MODE" button to move through "STANDBY" and return to the previous mode ("SPA" or "POOL"). Keypad inputs: The control accepts user inputs via the keypad on the front panel. 1. When changing the mode from "STANDBY" to either "SPA" or "POOL" there may be up to a 10- second delay for the blower fan to begin running. The control performs an internal self-test and then verifies that the blower vacuum switch contacts are open before energizing the blower. 2. It is normal for the heater to display a 1- to 2-second delay in responding to any keypad input. USE ONLY HAYWARD GENUINE REPLACEMENT PARTS Pomona, CA Clemmons, NC Nashville, TN Tel: 908-351-5400 www.haywardpool.com