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7.0 COMPONENTS & CONTROLS
Components
7.5 EcoNet
™
Variable Speed Outdoor Control (VSODC) (cont.)
7.5.7 Menu Structure
The (-)P20 product line is equipped with a dual
7-segment LED display and two push buttons
(SW2 and TEST). The display and push buttons
work together to allow the technician access to
fault recall, compressor speed locking, and heating
mode superheat measurement.
The following process can be used to access any
of these menus:
- Press the SW2 and TEST buttons for 5-8
seconds.
- After this time the dual seven segment LEDs
will show the first menu option (FC).
- To enter a menu, depress the SW2 button
- To toggle to the next menu depress the test
button.
- No action for 5 seconds in the root menu
structure will return the control to normal
operation.
Menu Definition:
FC = Fault Codes – by selecting this menu
the control will list the stored numerical fault
codes in order of sequence by which they were
stored. Depressing the SW2 button while a
fault code is shown will increment to the next
fault. Depressing the TEST button will force the
control back to the main menu.
CS = Compressor Speed – For this selection
menu to initiate the requested compressor
speed, there must be an active call for
compressor operation, the compressor must be
operating, and the selection must be static for
5 seconds. The Compressor Start and Run, and
Compressor Shut down algorithms will be used
to obtain the requested compressor speed.
• 3 (MAXIMUM Speed)
• 2 (INTERMEDIATE Speed)
• 1 (MINIMUM Speed)
SH (Superheat Measurement)
• The display is to show the following options:
• HI = Superheat is ≥+5°F [2.8ºC] away from
SH_SP
• hI = Superheat is b5° [2.8ºC] and 1.5°F
[0.8ºC] away from SH_SP
• 00 = Superheat is b1.5°F [0.8ºC] and
-1.5°F [0.8ºC] away from SH_SP
• lo = Superheat is between -1.5°F [0.8ºC] and
-5°F [2.8ºC] away from SH_SP
• LO = Superheat is ≤-5°F [2.8ºC] away from
SH_SP.
IMPORTANT:
This mode should be
manually exited. If this menu is not exited manually
the VSODC will wait 24 hours before returning to
normal operation. During this time the VSODC will
only request the selected compressor speed.
7.5.8 Replacement of the
VSODC
Each control board in the
EcoNet™
Communication Network
needs information
specific to the unit the control is installed in. This
information is called model data because it is
model specific information required for the HVAC
network to operate properly for the specific model
installed. The data for a unit contains information
that allows the unit to operate correctly.
When a control board requires replacement, it is
important that the replacement board gets the
model data from the old control. The primary way
the replacement control gets this information is by
the memory card that should be installed on the
old control. Remove the memory card from the
old control, replace the control, and reinstall the
memory card on the new control.
NOTE:
The control board for RP20**B units is not
interchangeable with RP20**A boards. Check part
numbers to confirm compatibility.
The memory card from a different unit should
never be used.
NOTE:
See links to training and service manuals
at MyRheem.com or MyRuud.com, or contact the
wholesale distributor selling this unit.
