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MAX 660 sec.
Hi
Operation
start
No. 10 pin of
microcomputer
Detected resistance
R19 + R18
No. 10 pin of
microcomputer
Detected resistance
R19 + R18
For Lo: 10 k
Ω
, for Hi: 10 k
Ω
+ 510 k
Ω
(resistance for CPU read)
For Lo: 15 k
Ω
, for Hi: 15 k
Ω
+ 910 k
Ω
(resistance for CPU read)
Blower Motor
ON
Fuel Pump
ON
Initial state timing
T8 end
Burner thermistor
Detected for 20 min.
Extinguishing
flame
SRE 156, 166, 176
SRE 260
Lo
Hi
R19
R19 + R18
R19
R19
R19 + R18
R19
Hi
Lo
Lo
Hi
Lo
Hi
Hi
No. 10 pin of
microcomputer
Detected resistance
R19 + R18
For Lo: 10 k
Ω
, for Hi: 10 k
Ω
+ 510 k
Ω
(resistance for CPU read)
SRE 156, 166, 176
R19 + R18
R19
Lo
Hi
Item
Test Item
3.3.4
3.3.4-1
3.3.4-2
3.3.4-3
3.3.4-4
3.3.4-5
3.3.4-6
3.3.4-7
BURNER THERMISTOR
Pre-heat shortened
resistance
Lower-limit resistance after
20 min.
Upper-limit resistance after
20 min.
Resistance at insufficient
pre-heat
Resistance at insufficient
initial pre-heat
Post-heat shortened
resistance
F-1 broken wire detection
Specifications
SRE 156
SRE 166
20
±
3.0 k
Ω
0.33
±
0.16 k
Ω
85
±
12 k
Ω
900
±
125 k
Ω
20
±
3.0 k
Ω
- - -
SRE 176
SRE 250
SRE 260
100
±
14 k
Ω
1.77
±
0.43 k
Ω
100
±
14 k
Ω
950
±
126 k
Ω
100
±
14 k
Ω
- - -
100
±
14 k
Ω
1.77
±
0.43 k
Ω
200
±
30 k
Ω
950
±
126 k
Ω
100
±
14 k
Ω
- - -
450
±
78 k
Ω
1.77
±
0.43 k
Ω
100
±
14 k
Ω
950
±
126 k
Ω
450
±
78 k
Ω
15
±
1.7 k
Ω
Remarks.
If value of Burner Thermistor is
insufficient initial resistance at
insufficient initial pre-heat or less
in the beginning of pre-purge
timing T5, Main Circuit Board will
not detect F-1 broken wire.
When Power Button is on, value of BTH (Burner Thermistor) is converted to that of LSB: A
When pump is on, value of BTH is converteted to that of LSB: B
After pre-heat extension(30 sec.), when pump is on, value of BTH is converted to that of LSB: B'. If A
≤
B + 2(LSB) is met when pump is on, Main Circuit Board performs pre-heat extension. If A
≤
B' + 2(LSB)
is met , it displays F-1. However, there is no detection for re-ignition (repeat). In addition, it does not
perform hot start during pre-heat extension. Extended time for pre-heat shall be 30 sec.
Burner thermistor detection circuit (No. 10 pin of microcomputer)
Sequence is as follows:
– 57 –
Содержание Kamin SRE 166 (Type B)
Страница 3: ...3 1 OUTVIEW AND SPECIFICATIONS OUTVIEW SRE 156 SRE 166...
Страница 4: ...4 SRE 176 SRE 250 SRE 260...
Страница 5: ...5 Oslo SRE 701 SRE 702 SRE 703...
Страница 7: ...7 SRE 250 SRE 260 Fuel Sub Tank...