North America • Latin America • India • Europe / Middle East / Africa • China • Pacific Rim
armstrong
international.com
Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit
armstrong
international.com for up-to-date information.
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Error Messages
Contactor Coil Failure P1
When this error is displayed the EHU stops steam production and sits idle displaying
the error.
This error is displayed when the contactor does not engage when there is a demand to the EHU.
• Check F1 fuse (2 Amp)
• Confirm wires 13 and 14 are secure at contactor and X4 connector.
• Confirm X4 connector to main board is secure.
• Check contactor coil for proper resistance (5-6 ohms Ω)
To clear this error after correcting the problem, cycle power to the EHU. If the error is not corrected it will reappear 4
minutes after detection.
If the remote information board is being used, the general fault contact is on and the maintenance contact is off.
Contactor Blocked P2
This error is displayed when the contactor is engaged with no demand for steam
(0% demand).
Shut off power at the breaker before servicing!
• Check contactor for proper operation. If contactor functions properly replace main board.
To clear this error after correcting the problem, cycle the power to the EHU. If the error is not corrected it will be displayed
again after 2 minutes of re-detection.
Remote Information Board:
• General fault contact is on
• Maintenance contact is off
Inlet Water Valve P3
This error is displayed when the fill valve is leaking water by into the steam
generator tank?
• Check fill valve for debris
• Check drain valve is clear of any debris and is functioning properly
To reset this error after correcting the problem, cycle power to the EHU. If the error is not corrected it will be displayed again
after 20 minutes from detection.
Remote Information Board:
• General fault contact is on
• Maintenance contact is off
