Bryant ASPAS1BBA015 - Manual (Page 98)

Page 98
SECTION 4.4
DIAGNOSTIC TESTS
PART 4
DC CONTROL
PROCEDURE:
Disconnect all wires from switch terminals, to prevent
interaction. Then, use a volt-ohm-milliammeter (VOM)
to test for continuity across switch terminals as shown
in the following chart. Reconnect all wires and verify
correct positions when finished.
RESULTS:
1. Replace Auto-Off-Manual switch, if defective.
2. For Problem 8 Only: If the switch passes the tests, verify
the remote not auto dip switch is set to OFF on the
circuit board (see Figure 3, Section 4.1) then proceed to
Test 44.
3. For Problem 9 Only: If the switch passes the tests,
proceed to Test 60.
Figure 2. Auto-Off-Manual Switch Test Points
TEST 44- CHECK WIRE 15/15A/17/239
VOLTAGE
DISCUSSION:
The circuit board will not turn on unless battery
voltage is available to the board via wire 15, the Auto-
Off-Manual switch and Wire 15A. If battery voltage is
not available, automatic or manual operation will not
be possible.
Battery voltage is available to wire 17 from pin
location 11 of the J1 connector on the circuit board.
When the Auto-Off-Manual switch is in the MANUAL
position, wire 239 supplies battery voltage to pin
location 9 of the circuit board, and engine cranking
occurs.
PROCEDURE:
(For Problem 1 flow chart, do Steps 1-5 and Step 9
only)
(For Problem 2 flow chart, do all steps)
1. Set a VOM to measure DC voltage.
2. Connect the positive (+) test lead to the Auto-Off-Manual
switch Terminal 2, Wire 15. Connect the negative (-)
test lead to a clean frame ground. Battery voltage
should be measured (See Figure. 2).
3. Connect the positive (+) test lead to the Auto-Off-Manual
switch terminal 1, Wire 15A. Connect the negative (-)
test lead to a clean frame ground. Set the Auto-Off-
manual switch to MANUAL. Battery voltage should be
measured.
4. Connect the positive (+) test lead to Pin location 12 Wire
15 at the J1 connector on the circuit board. Connect the
negative (-) test lead to a clean frame ground. Battery
voltage should be measured.
5. Connect the positive (+) test lead to pin location 10, wire
15A at the J1 connector on the circuit board. Connect
the negative test lead to a clean frame ground. Set the
Auto-Off-Manual switch to the MANUAL position.
Battery voltage should be measured. Repeat Step 5.
This time set the Auto-Off-Manual switch to AUTO.
Battery voltage should be measured.
6. Connect the positive (+) test lead to pin location 9, wire
239 at the J1 connector on the circuit board. Connect
the negative (-) test lead to a clean frame ground. Set
the Auto-Off-Manual switch to the MANUAL position.
Battery voltage should be measured. If battery voltage
is measured, stop and proceed to results. If battery
voltage is not measured, proceed to Step 7.
7. Connect the positive (+) test lead to the Auto-Off-Manual
2
5
6
4
3
1
1
2
3
4
5
6
SW1
SW1
SCHEMATIC
MANUAL
AUTO
15
15A
239
17
15
15
15A
239
17
TERMINALS SWITCH POSITION READING
2 and 3 AUTO C ONTINUITY
MANUAL I NFINITY
OFF I NFINITY
2 and 1 AUTO I NFINITY
MANUAL C ONTINUITY
OFF I NFINITY
5 and 6 AUTO C ONTINUITY
MANUAL I NFINITY
OFF I NFINITY
5 and 4 AUTO I NFINITY
MANUAL C ONTINUITY
OFF I NFINITY