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Operational Flow Chart
Plug In
Power On
(1)
Self
check routine
NO
normal?
Software
malfunction
YES
Pump relay
energised
(2)
Is tank
temperature > or
= 75ºC?
NO
A
YES
Green LED
on (solid)
Is hot
sensor temp < 4ºC
above cold sensor
temp?
NO
(2)
Is hot
sensor temp
> or = tank temp
+ 12ºC?
YES
Green LED
2 flash
(3)
Pump 1 & 2 on
2 min
(3)
Pump 1 & 2 on low
(pulse controlled)
Green LED
3 flash
(3)
Pump 1 & 2 speed
1 min
pulse controlled
Green LED
4 flash
(3)
Pump 2 off
TM024 Premier Loline Solar Drain back Service Instructions REV: A
D.O.I: 12/12/2007
This document is stored and maintained electronically by
Operational Flow Chart
Restore Power
Rectify fault
Hot sensor open
Hot sensor short
circuit
Red LED 1 flash
Red LED 2 flash
Green LED
YES
YES
(2)
Is hot
sensor temp <
NO
5ºC above tank
temp?
Notes
(1) Self check routine is
performed every 20 milliseconds
regardless of stage of operation.
(2) Tank temp = average temp of
sensor strip top 3 thermistors.
(3) Pump 2 (auxiliary pump) is
optional and is utilised only if
collector heights are between 9
& 18 metres high.
0 sec
30 sec
The pump(s) speed is pulse
controlled by the control board
to limit the temperature rise of
the fluid across the collectors
to 10ºC. For pump 1 this will
occur from this period onwards
until pump 1 is switched off by
the control board.
Service. All printed copies not bearing this statement in RED are deemed "uncontrolled"
Isolate Power
Cold sensor open
circuit
or short circuit
Red LED 3 flash
5 flash
YES
Is cold
NO
sensor temp >
NO
75ºC?
NO
(2)
Is tank
temperature > or
= 75ºC?
NO
Is hot
sensor temp < 4ºC
above cold sensor
temp?
NO
(2)
Is hot
sensor temp <
5ºC above tank
temp?
NO
Is cold
sensor temp >
75ºC?
NO
Is hot
sensor temp >
95ºC?
NO
Is hot
sensor temp
< 20ºC?
NO
8
Pump relay
de-energised (if on)
Thermistors open
Sensor strip
or short circuit
unplugged
Red LED 4 flash
Red LED 5 flash
YES
YES
Is hot
Is hot
sensor temp >
NO
sensor temp <
95ºC?
20ºC?
YES
YES
Pump 1 off
YES
YES
YES
YES
YES
Pump 1 off
A
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