Mode Jumper And Positioning - Aquacal 100 Owner's Manual And Installation Manual

Controls Configuration & Adjustments...
Microprocessor Mode Jumper Positioning
The HP7R microprocessor is designed to operate as a Heat-Only or a Heating & Cooling controller.
The selection between the two choices is made through the positioning of a mode jumper contained
on the microprocessor board. The position of the jumper is set at the factory, and is dependant
upon the design of the heater being controlled. Heaters designed to heat only have the
microprocessor mode jumper set in the heat-only mode; heaters capable of both heating and
cooling (reversing) have their microprocessor mode jumpers set to permit control of both heating
and cooling.
Important: The position of the mode jumper must match the capabilities of the heat pump. Simply
placing the mode jumper to the heating and cooling position, with a heater designed to heat only, will
not make a heat-only heater heat & cool. In fact, a mis-positioned mode jumper will cause heater
control difficulties.
1. Apply electrical power to the heater.
2. Review the available modes by repeatedly pressing the [MODE] key
A. Heat-Only Models: The [MODE] key functions should appear as: [OFF] and [HEA].
B. Heat-Cool Models (Icebreakers): The [MODE] key functions should appear as: [OFF], [HEA],
[COO], and [AHC].
3. If the above modes do not display correctly for the heater being serviced, the selector jumper,
located on the microprocessor PC board, is likely placed in the wrong position. To correct this
condition, the jumper connections will need to be repositioned. See repositioning instructions,
below.
Use this procedure if it is determined the mode jumper positioning is incorrect. The mode jumper is
located on the microprocessor controller board, within the heater's electrical enclosure.
WARNING !
This is NOT an owner or operator procedure. Repairs must not be attempted by untrained
and/or unqualified individuals. Risk of Electrical Shock...Ensure all electrical power to the
heater has been disconnected prior to removing the heater front access panel. Leave electrical
power disconnected throughout the following jumper repositioning procedure.
1. To access the jumper, first remove the heater front entry panel; then, remove the metal cover
from heater electrical enclosure. For layout details of the microprocessor control board, see
figures on next page.
2. Locate the mode jumper in the upper right hand corner of the control board. If the jumper is
found to be incorrectly positioned, gently disengage the jumper by pulling it directly away from
the control board.
3. Per the figures on the following page, identify the correct location for the jumper, and gently
reposition the jumper leaving one pin uncovered. Note: The jumper should cover two (2) pins:
one always being the middle pin, and the other the correct pin for the features of the heat pump.
Mode Jumper Explained
Verifying the Mode Jumper Position is Correct
Repositioning the Mode Jumper
Failure to heed the following may result in permanent
injury or death.
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