DIAGNOSTIC CHECK POINTS
(Rfer to Wiring Schematic on Page 19)
Number | DescriptionA |
E1 | Display Board Send |
1+5Vdc
2data signals
3ground
E2 | Touch switch inputs (with switches connected), typical |
1+5VDC
2Ground Common for measurements on E2
3Not connected
4When button is touched +4Vdc to +5Vdc, otherwise less than +1Vdc.
5When button is touched +4Vdc to +5Vdc, otherwise less than +1Vdc.
6When button is touched +4Vdc to +5Vdc, otherwise less than +1Vdc.
7+5Vdc
8 | Ground Common for measurements on E2. |
9Not connected.
10When button is touched +4Vdc to +5Vdc, otherwise less than +1Vdc.
11When button is touched +4Vdc to +5Vdc, otherwise less than +1Vdc.
12When button is touched +4Vdc to +5Vdc, otherwise less than +1Vdc.
E3 | Outputs and line voltage inputs (loads connected) typical. |
1Showroom switch off = 0V, on = 120VAC
2– 7 Not connected.
8Door switch open = 0V, closed = 120VAC.
9When Zone* is being cooled or service mode = 115 VAC , off = 0V
10When Zone* is being cooled or service mode = 115 VAC , off = 0V
11When Zone* is being cooled or service mode = 115 VAC , off = 0V
12When zone** is being cooled or service mode = 115 VAC , off = 0V
13When zone** is being cooled or service mode = 115 VAC , off = 0V
14When zone** is being cooled or service mode = 115 VAC , off = 0V
15When zone* lights to be on = 115 VAC , off = 0V
16Power line neutral. Common for all E3 measurements.
*E3 pin 9 Solenoid #1 / pin 10 Solenoid #2 / pin 11 Solenoid #3
**E3 pin 12 Evap. Fan #1 / pin 13 Evap. Fan #2 / pin 12 Evap. Fan #3.
NOTE: All wiring controlling Fan #3, Sol #3, and both #3 Thermisters have Black strips. All wiring controlling Fan #2, Sol #2 and both #2 Thermisters have Red strips. All wiring controlling Fan #1, Sol #1 and both #1 Thermisters have White strips.
14
