What to do if I see an oil spot on my NorAire EB-HPH Heat Pump?
If you notice an oil spot on your NorAire Heat Pump, either at the outdoor or indoor unit, it probably indicates a refrigerant leak. You should report this to your installing contractor for further inspection and repair.
Why is my NorAire EB-HPH not producing heat?
If your NorAire heat pump isn't producing heat, start by checking the unit's display. It should show 'ACD', 'OFF', or an active mode screen. If the screen is blank, refer to the steps for a blank display. If it shows 'OFF', the unit isn't being told to turn on, so verify the field low voltage wiring (R & W1 and R & W2). If an active 'Mode' screen is displayed, compare the ST and DT values; if ST is greater than or equal to DT, the electric elements won't engage. If DT displays 'N.A', the heat pump or external gas boiler should be running, so check the appropriate heat source. Also, check line 4 of the LCD display for active system faults and use the Electro Industries App 'Fault Monitor' to see the history of faults.
How to fix a blank display on my NorAire EB-HPH?
If the display on your NorAire Heat Pump is blank and nothing is turning on, begin by checking the 5A fuse located on the control board to ensure it's in good working order. If the 5A fuse is open, replace it. If the fuse is not open, check the primary and secondary side of the transformer to ensure power is available. If good secondary voltage is detected, disconnect all low voltage wires (excluding the 24VAC secondary side of the transformer) from the control module. If the screen remains blank, the board likely needs replacement. However, if the screen illuminates and displays 'ACD', it indicates an issue with the low voltage wiring.
What to do if my NorAire Heat Pump is not outputting adequate water temperature?
If your NorAire Heat Pump isn't outputting adequate water temperature, first check the general comments. When operating in 'Heat Pump Only' mode (as indicated on LCD line 1), the outdoor temperature affects the heat pump's output capacity. You may need to adjust the 'Boost In' time and 'Stage Disables' to better align the unit's operation with the building's requirements, potentially entering 'Boost' faster. In 'Boost Mode' (LCD line 1), the unit uses the 'Differential Temperature' setting (adjustable via the app) to determine the desired output temperature (RT + 'Differential Temperature' = DT). The factory default is 10°. If a larger differential is needed, increase the 'Differential Temperature' value using the app. Also, 'Stage Disables' are used in 'Boost Mode', so consider the outdoo...
Provides electrical specifications for the indoor unit, including power, current, and heating capacity.
Details electrical specifications for the outdoor unit, referencing manufacturer's manual for details.
Explains jumper settings (J4, J3) for system configuration and monitoring.
Describes software setup variables and system modes configurable via the product display.
Guides users on navigating and interpreting the 4-line LCD display for system status.
Details various operational modes displayed on the LCD, such as OFF, HP ONLY, BOOST, etc.
Explains temperature readings (ST, OT, RT, DT) and fault indicators shown on the LCD.
Outlines essential pre-operation checks and data collection for system startup.
Covers advanced connection options and special equipment considerations for the unit.
Explains the meaning of various LEDs and indicators on the control board.
Provides a high-level flowchart for basic troubleshooting of system operation.
Offers specific solutions for common issues like blank display, no heat, or inadequate temperature.
Lists available accessories for the NorAire zone controller and system.
Provides a list of common replacement parts with their part numbers and descriptions.
Outlines the terms and coverage of the residential limited product warranty.
Details the conditions, exclusions, and limitations applicable to the product warranty.
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General