Bryant ASPAS1BBA007, Руководство по диагностике и ремонту

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Page 68
SECTION 3.4
DIAGNOSTIC TESTS
PART 3
“V-TYPE” PREPACKAGED
TRANSFER SWITCHES
7. Disconnect Wire N1A from transfer relay (TR) terminal
and connect one test lead to it. Connect the other test
lead to F1 top fuse terminal Wire N1A. CONTINUITY
should be read. Reconnect Wire N1A.
RESULTS:
Repair any defective wiring that does not read
CONTINUITY. If wiring tests good, proceed to Test
23.
TEST 33 - CONTINUITY TEST OF WIRING (C2)
DISCUSSION:
This test will ensure that all control wiring has
continuity.
1. See Test 32, Step 1
2. See Test 32, Step 2
3. See Test 32, Step 3
4. See Test 32, Step 4
5. Disconnect Wire E2 from the standby coil (C2) and
connect one test lead to it. Connect the other test lead
to Terminal Lug E2 of the transfer switch. CONTINUITY
should be read. Reconnect Wire E2.
6. Disconnect Wire 205 from transfer relay (TR) Terminal 6
and connect one test lead to it. Connect the other test
lead to limit switch XB1 top terminal Wire 205.
CONTINUITY should be read. Reconnect Wire 205.
7. Disconnect Wire E1 from Transfer Relay (TR) Terminal 9
and connect one test lead to it. Connect the other test
lead to terminal lug E1 of the transfer switch.
CONTINUITY should be read. Reconnect Wire E1.
RESULTS:
Repair any defective wiring that does not read
CONTINUITY. If wiring tests good, proceed to Test
23.
TEST 34 - CHECK N1 AND N2 WIRING
DISCUSSION:
A shorted Wire N1 or N2 to ground can cause fuse F1
or F2 to blow.
PROCEDURE:
1. On the generator panel, set the Auto-Off-Manual switch
to OFF.
2. Turn off the utility power supply to the transfer switch,
using whatever means are provided.
3. Remove fuses F1 and F2 from the fuse holder (see
Figure 5).
4. Remove the generator control panel cover. Disconnect
wire N1 and wire N2 from the interconnection terminal in
the control panel, or the terminal strip.
5. Set your VOM to the 'R x 1" scale. Connect the positive
meter test lead to wire N1.
a. Connect the negative meter lead to the ground
lug. Infinity should be measured.
b. Connect the negative meter lead to Wire 23 at
ICT or terminal strip. Infinity should be
measured.
c. Connect the negative meter lead to Wire 194 at
ICT or terminal strip. Infinity should be
measured.
d. Connect the negative meter lead to the neutral
connection. Infinity should be measured.
6. Set your VOM to the 'R x 1" scale. Connect the positive
meter test lead to wire N2.
a. Connect the negative meter lead to the ground
lug. Infinity should be measured.
b. Connect the negative meter lead to Wire 23 at
ICT or terminal strip. Infinity should be
measured.
c. Connect the negative meter lead to Wire No.
194 at ICT or terminal strip. Infinity should be
measured.
d. Connect the negative meter lead to the neutral
connection. Infinity should be measured.
7. Disconnect wire N1 and wire N2 from transformer TX.
8. Connect one test lead to wire N1 removed in step 7, and
the other test lead to the ground terminal. INFINITY
should be measured.
9. Connect one test lead to wire N2 removed in step 7, and
the other test lead to the ground terminal. INFINITY
should be measured.
10.If no short is indicated in steps 5 through 9, proceed with
steps 11 through 15. If a short is indicated in steps 5
through 9, repair shorted wiring.
11.Reconnect wires N1 and N2 to the interconnection
terminal or terminal strip.
12.Replace fuses F1 and F2 in the fuse holder.
13.Turn on the utility power supply to the transfer switch
using whatever means is provided.
14.Set VOM to measure AC voltage. Connect one test lead
to wire N1 and the other test lead to wire N2. Utility line
to line voltage should be measured.
15.Turn off the utility power supply to the transfer switch
using whatever means is provided.