NorAire EB-HPH Series, Инструкция по установке и эксплуатации

Страница: 47 / 52

09/06/2018 45 BI903
Troubleshooting Solution
Display is blank
and nothing is
turning on

This unit includes a 5A fuse located on the control board, verify it is in
good working condition.

If 5A fuse is open, replace.

If 5A 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 (not
including 24VAC secondary side of transformer) from the control module.
If screen is still blank, replace board. If screen illuminates and displays
“ACD”, there is an issue with low voltage wiring.
Unit is not
producing heat

Check unit display. Display should show “ACD”, “OFF” or an Active mode
screen.

If screen is blank, see steps above.

If screen displays “OFF”, unit is not being told to turn on. Verify field low
voltage wiring is correct (R & W1 and R & W2)

If screen displays active “Mode” screen, compare the ST and DT, if ST >=
DT, this NorAire unit will not engage the electric elements.

If DT displays “N.A”, this indicates that either the heat pump or external
gas boiler should be running. LCD line 1 (MODE) should indicate this.
Check appropriate heat source as indicated by the above statement.

Line 4 of the LCD display does indicate active system faults. Reference this
as well. NOTE the Electro Industries App does have a “Fault Monitor”
section where you can see history of faults.
Unit is not
outputting
adequate water
temperature

Check the above comments first.

Note that when in “Heat Pump Only” operation (see LCD line 1 MODE),
the outdoor temperature will determine the heat pump output capacity. You
may need to adjust the “Boost In” time along with “Stage Disables” to
better align this NorAire operation to meet the building requirements (enter
into “Boost” faster).

Note that when in “Boost Mode” operation (See LCD line 1 MODE), the
NorAire will reference the setting called “
Differential Temperature”
(adjustable with App) to formulate a desired output temperature (RT +
“
Differential Temperature” =
DT). Factory default is 10°. If this is not a
large enough differential, use the App to increase the “
Differential
Temperature”
value. Also note that “Stage Disables” are used in “Boost
Mode”. Make note of the outdoor temperature as you’re troubleshooting in
this scenario.

The NorAire has special sequence in reacting to a faulty outdoor
temperature sensor and/or faulty return temperature sensor. It will
essentially “limp along” in an effort to draw attention to itself without
creating a no heat situation. If LCD displays “OT = BAD” or “RT = BAD”.
Replace appropriate sensor and cycle power to the unit to restore full
NorAire operation.
Visible oil spot

If an oil spot is noticed at either the outdoor or indoor unit, this is likely a
sign of a refrigerant leak. Report to installing contractor.