System Error Codes Heater Error Codes A Heater Error Code appears on the Heater Panel when a component of the Heater has failed during normal usage. Each Heater Error Code and it’s appropriate corrective actions are explained on the following pages. Heater Error: Heater Error H01: System Error Problem Description: Abnormal operation of the Heater Relay Assembly. Corrective Action: Try the following: „ Replace the Heater Relay Assembly ⇒ Page 8-46 . Heater Error: Heater Error H02: Relay Board Error Problem Description: The Heater Board and the Relay Board are not connected together. Corrective Action: Try the following:
„ Make sure that the Heater Board is connected correctly to the Relay Board via the Relay Cable. „ Replace the Heater Relay Assembly ⇒ Page 8-46 . Heater Error: Heater Error H03: Front Heater Temperature Error Problem Description: Temperature read by the Front Heater is abnormal ( lower than -10 o C or higher than 70 o C) . Corrective Action: Try the following: „ Make sure that the Heater Relay Assembly is connected correctly to the Front Heater. „ Replace the Heater Relay Assembly ⇒ Page 8-46 . „ Replace the Front Heater ⇒ Page 8-29 . Heater Error: Heater Error H04: Rear Heater Temperature Error Problem Description:
Temperature read by the Rear Heater is abnormal ( lower than -10 o C or higher than 70 o C) . Corrective Action: Try the following: „ Make sure that the Heater Relay Assembly is connected correctly to the Rear Heater. „ Replace the Heater Relay Assembly ⇒ Page 8-46 . „ Replace the Rear Heater ⇒ Page 8-31 . HP Designjet 9000s Series Printer Service Manual 2-15