24
S E R V I C E
M A N U A L
L A S E R H E A T I N G S Y S T E M S
4-2
Control Circuit Board
Time Chart
L A S E R H E A T I N G S Y S T E M S
Trouble Shooting
Section 4
No
Item
Specification
Conditions
Remarks
4
Burner thermistor trouble
detection
A
:
200 ± 40k
B
:
450 ± 90k
When abnormal combustion is detected after
pre-combustion timing (T7), shift to extinguishing
process and stop operation.
Display E- 13
Thermistor used is B constant 5250; resistance at 25
deg. C is 8.02 K
.
5
Fuel pump frequency control
H combustion
H1 combustion
M combustion
M1 combustion
M2 combustion
L combustion
A
:
15.970 ± 0.5Hz
B
:
20.540 ± 0.5Hz
A
:
14.373 ± 0.5Hz
B
:
18.486 ± 0.5Hz
A
:
11.380 ± 0.5Hz
B
:
14.263 ± 0.5Hz
A
:
11.380± 0.5Hz
B
:
14.263 ± 0.5Hz
A
:
7.985± 0.5Hz
B
:
10.269 ± 0.5Hz
A
:
6.330± 0.5Hz
B
:
7.990 ± 0.5Hz
6
1
Blower motor control
Speed (1 minute average)
High (H)
Medium (M)
(M1)
(M2)
Low (L)
(L1)
A
:
2900 ± 1.4%rpm
B
:
3200 ±1.4%rpm
A
:
2550 ±1.4%rpm
B
:
2550 ±1.4%rpm
A
:
2550 ±1.4%rpm
B
:
2700 ±1.4%rpm
A
:
2350 ±1.4%rpm
B
:
2500 ±1.4%rpm
A
:
1700 ±1.4%rpm
B
:
1800 ±1.4%rpm
A
:
1500 ±1.4%rpm
B
:
1500 ±1.4%rpm