6-2. Reset Circuit
The reset circuit initializes the microcomputer program when Power is ÒONÓ from ÒOFFÓ.
Low voltage at pin 48 resets the microcomputer , and HI activates the microcomputer.
Fig. 6-7 shows the reset circuit and Fig. 6-8 shows waveform at each point when power is turned on and
off.
When power is turned on, 12V line and 5V line voltages rise and 12V line voltage reaches 10.9V an
reset voltage input to pin 48 of microcomputer is set to Hi .
Reset voltage will be hold ÒHiÓ until the 12V line voltage drops to 9.90V even though the power shuts
down.
Fig. 6-7
Fig. 6-8
−
MAIN P.W.B.
Microcomputer
RESET OUT.
RESET
56
48
C204
0V
R252
1
0V
8
2
3
IC5(1/2)
+
5V
D208
R287
C215
R284
R286
C225
R285
C226
R292
R289
R288
0V 0V 0V 0V
12V
12V line
12V line
5V line
5V line
Reset volage
Reset volage
Time
Time
10.9V
9.9V
12
6
0
12
6
0
Power
is
ON
Voltage
(V)
Power
is
OFF
Voltage
(V)
– 59 –
Summary of Contents for Summit RAC-18YH5
Page 6: ...SPECIFICATIONS 0 4 ...
Page 17: ... 01 2 34 5 6 2 7 6 7 8 3 9 15 ...
Page 18: ... φ 0 φ φ 0 1 1 1 2 33 16 ...
Page 20: ... 0 0 1 203 1 202 4 5 5 6 6 728 5 9 7 8 2 7 4 18 ...
Page 21: ... 19 ...
Page 24: ...RAC 18YH5 MODEL A X 8 T 1 1 SELF CHECK SELF MODE SERVICE SW RED RED RED 23 ...
Page 25: ... 25 0 0 0 1 1 1 1 2 0 1 3 44 5 1 1 6 7 4 887 8972 ...
Page 26: ... 27 ...
Page 27: ... 28 Mode data file RAS 18YH5 VALUE LABEL NAME ...
Page 28: ... 29 0 1 1 2 334 5 22 1 6 0 7 0 7 6 8 1 9 0 1 1 66 66 5 0 7 22 22 1 1 ...
Page 31: ... 35 0 1 ...
Page 32: ... 36 ...
Page 33: ... 0 1 2 3 4 1 2 0 1 2 3 4 1 2 5 6 6 5 6 6 7 4 4 37 ...
Page 34: ... 2 Receiver Circuit 3 Buzzer Circuit 01 23 4 5 5 6 6 6 78 9 4 9 5 4 9 8 2 38 ...
Page 36: ...5 Initial Setting Circuit IC401 6 Power Supply 0 1 2 2 3 4 2 5 6 4 7 8 6 9 8 6 40 ...
Page 37: ... 7 Fan Motor Drive Circuit 0 0 1 2 3 3 0 45 67 8 7 45 3 0 9 0 2 2 1 52 152 2 2 41 ...
Page 38: ... 0 1 2 3 4 1 2 3 3 3 0 3 5 6 1 7 7 5 8 0 42 ...
Page 40: ... 0 1 0 2 3 3 2 3 3 2 3 3 2 44 ...
Page 43: ... 1 8 0 9 1 8 0 9 47 ...
Page 45: ... 0 49 ...
Page 48: ... 0 12 3 4 0 12 5 5 4 6 7 3 8 9 3 9 9 9 4 4 4 52 ...
Page 49: ... 0 1 2 3 4 5 45 5 4 5 45 5 5 4 45 45 5 5 53 ...
Page 50: ...5 Power Circuit for P W B 54 ...
Page 54: ... 0 1 2 23 23 4 5 6 7 8 6 6 9 0 6 1 3 1 6 0 1 6 6 0 9 58 ...
Page 57: ... 0 0 0 1 8 Reversing valve control circuit 2 334 5 4 6 5 7 8 0 3 0 8 0 8 0 61 ...
Page 67: ... 71 0 0 1 2 31 0 4 5 0 6 1 6 6 0 1 5 0 1 6 0 0 6 0 ...
Page 68: ... 72 0 1 2 THE SUPPORT FUNCTION OF FAILURE DIAGNOSIS ...
Page 69: ... 73 0 1 2 3 4 5 6 3 3 7 8 6 9 3 8 6 9 3 6 8 698 6 6 60 9 6 8 ...
Page 70: ... 74 ...
Page 77: ... 81 ...
Page 80: ... 84 0 1 0 1 2 0 3 4 1 3 0 3 1 5 5 5 5 5 5 5 5 ...
Page 82: ... 86 0 1 0 2 3 2 3 4 4 4 4 4 ...
Page 83: ... 87 ...
Page 84: ... 88 0 10 2 3 3 4 1 2 2 5 2 6 7 7 7 7 7 7 7 3 3 3 3 3 3 3 ...
Page 85: ... 89 0 12 3 3 3 ...
Page 86: ... 90 0 12 1 3 4 5 4 5 4 5 4 65 65 7 6 8 9 2 8 5 ...
Page 88: ... 92 IPM Intelligent Power Module DIAGNOSIS ...
Page 91: ... 95 4 Tangential air flow fan and fan motor 1 Electrical parts 0 1 211 3 0124 5 6 78 ...
Page 92: ... 96 ...
Page 93: ... 97 ...
Page 94: ... 98 ...
Page 95: ... 99 ...
Page 96: ...Printed in Japan TSK AW NO 0010E RAS 18YH5 RAC 18YH5 F ...