Len Gordon Lennovator, Owner'S Installation & Operations Manual

5

MASTER CONTROL UNIT FEATURES

The Master Control Unit is made up of four basic blocks:

      1.  Processor

      2.  Relays & Relay Control Logic

      3.  Power Supply

      4.  Transceiver

1.  PROCESSOR

The processor controls all of the master control unit
functions except the time clock.  The Processor is a
microchip P1C16C73.  The processor’s tasks are

A.  Water Temperature
B.   Temperature Set Point
C.  Heat Command
D.  Status Command
E.  Jets Command Aux-1
F.  LightAux-2 
G.  Power on ConditioningAux-3

A.

  WATER TEMPERATURE

If the water temperature exceeds 109

E

F but is less than

120

E

F, a warning is sent to the remote unit and is

indicated by the water temperature flashing on and off.  If 
the water temperature exceeds 120

E

F, it will send a

message to the remote unit which will be displayed as
“OH” and shut down all functions.

B.  

TEMPERATURE SET POINT

Store a temperature set point from 35E to 80EF in 5E
increments or from 32E to 35E or 80E to 104E in 1E
increments.  The temperature set point will be
incremented up by the “UP” command and down by the
“DOWN” command from the remote control unit. 
Following each up and down command the processor will 
send the temperature set point to the remote control unit
followed with the actual water temperature approximately 
two seconds later.  When a status command is received
the processor will send the temperature set point to the
remote control unit with the actual temperature date
following in approximately two seconds.
To set a desired temperature, simply press up or down
arrows until the desired temperature appears on the
display.

C.  

HEAT COMMAND

When a “HEAT” command is received from the remote control
unit, the processor will do the following:

1.  Turn the filter pump on,

2.  Activate the pool/spa valves to activate the spa,

3.  Turn on the “HEAT ENABLE” command to the relay logic,

4.  Compare water temperature with temperature set point,

5.  If the water temperature is lower than the temperature set
point, it will turn on the heat command to the relay logic and
send back a status message to the remote control which will
include data to turn on the “Heating” icon or if the water
temperature is equal to or higher than the temperature set point, 
it will send a status message back which will include data to turn 
on the “Ready” icon.  The heating and ready icons should never
be on at the same time.

6.  When in the heat mode, the processor will periodically
monitor the water temperature against the temperature set point 
and turn the heating command on or off to the relay logic (with a 
1

E

 Hysteresis) as required to maintain correct water

temperature.

7.  When a heat command is received while in heat mode, the
processor will go out of heat mode turning off heat enable
command and heating command (if on) to the relay logic.  It will
then send back a status message to the remote control clearing
the heating or ready icon.  The pump will stay on for 2.5 minutes 
(fireman’s switch).

If the water temperature goes below 35

E

F, the processor will

automatically go into heat mode until the temperature reaches
40

E

F to prevent damage in freezing weather.

D.  

STATUS COMMAND

When a “STATUS” command is received from the remote
control the processor will send a status message back which will 
always contain information to turn on or off the status icons, as
required; heat on or off and temperature set point followed by
actual water temperature, for approximately two seconds each.

E.  

JETS COMMAND

When “JETS” command is received from the remote control unit 
the processor will turn on the jets command to the relay logic
and return a status message to the remote control unit.  Another 
jets command from the remote control unit will turn off the jets
command to the relay logic.  If in jets mode for 30 minutes and
no jets command was received from the remote control, the
processor will automatically turn off the jets command to the
relay logic.