Lx Series Installation and Operation Instructions
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Trinity Lx
81
User Interface (Touch-screen Display)
A blank screen does not necessarily indicate a problem; the display may be configured to automatically blank the
screen after a pre-set interval. Simply touch the screen to activate it. Confirm that 120V power is being supplied
to the boiler. If the screen does not become active, perform the following procedure:
Blank Screen
1.
Remove the front cover from the boiler.
2.
Remove the control panel cover and check Fuse “C” (Auto Blade Type); if faulty check for shorts in the
thermostat wiring, correct, then replace fuse (see Figure 17-1).
3.
Ensure the “2 by 2” Molex connector, located behind the display at the top, is connected and that the wires
are fully inserted (see Figure 17-2). Verify that 24VAC is present between the Blue and Red wires; if not
trace wiring back to 24VAC transformer; correct wiring and/or replace transformer [see applicable Figure
13-1(a) or 13-2(a)].
4.
Remove the display assembly from the control panel and check the 24VAC wiring connection on the back of
the display; Blue to terminal 7 [24VAC (COM)], Red to terminal 8 [24VAC].
System Disconnected
If the Touch-screen Display is not blank, but is displaying “System Disconnected!” in the middle of the screen,
ensure the 4 by 1 Molex connector, located behind the display at the top, is connected and that the wires are fully
inserted (see Figure 17-2). If the connector appears to be fine, check the wiring connections on the back of the
touch-screen display; Green, Red and Black go to terminals 1, 2 and 3 respectfully.
Figure 17-2 Touch-screen Display Electrical Disconnects
Power Supply Connector (2 by 2)
Communication Connector (4 by 1)
DO NOT drop the plastic housing or allow it to swing down freely, it may be damaged
by forceful impact.
Red
Black
Blue
Blue (White on bottom)
Red
Red
Green
Green
Black
White
Red
Black
Содержание Trinity Lx 150
Страница 61: ...Lx Series Installation and Operation Instructions Trinity Lx 61 Figure 13 1 b Ladder Logic Diagram Lx150 400...
Страница 62: ...Trinity Lx Installation and Operation Instructions Lx Series 62 Figure 13 2 a Connection Diagram Lx500 800...
Страница 63: ...Lx Series Installation and Operation Instructions Trinity Lx 63 Figure 13 2 b Ladder Logic Diagram Lx500 800...
Страница 103: ...Lx Series Installation and Operation Instructions Trinity Lx 103 NOTES...