Bunn Single TF Operating & Service Manual page 23
1.75 gallon
Hide thumbs
Also See for Single TF:
- Operating & service manual (47 pages) ,
- Illustrated parts catalog (35 pages) ,
- Use & care information manual (6 pages)
Table of Contents
Advertisement
SERVICE (cont.)
ELECTRONIC CONTROL ASSEMBLY
7
5
22978.0000
6
4
3
15
2
1
1. Electronic Control
2. Terminal Block
3. Timer
4. Liquid Level Switch
& Overflow Cup
5. Tank Heater
6. Limit Thermostat
7. Liquid Level Probe
Location:
The electronic control assembly (1) is located
inside the lower left front on the component bracket of
the brewer. Access will also be needed to the tempera-
ture sensor (8), liquid level probe (7) located on the
tank lid and to the triac assembly (15) located beneath
the tank.
General:
This system controls the liquid level and water
temperature of the brewer. These two functions act
independently of each other and should be tested
separately.
BREW START - LOCK
The water must be heated to the preset tempera-
ture indicated by the glowing ready light before a brew
8
12
9
11
J1
J2
SET
LOC
K
itc h
N
Sw
!
IO
te r
uc et
U T
H ea
d Fa
C A
e Ta
nk
ne
O pe
!
O n
Th
Fr om
rn
es
Tu
C om
at er
ra nt
y!
il W
U nt
W ar
id s
y Vo
m pl
Co
To
re
Fa
ilu
IN G
R N
W A
U S
D O
AR
E
H AZ
AG
LT
VO
O M
T FR
CE
EC
UR
!
O NN
SO
VI NG
DI SC
M O
W ER
RE
PO
RE
BE
FO
13
14
16
8. Temperature Sensor
9. Dispense Valve
10. Bypass Valve
11. Ready Light
12. Solenoid Valve
13. LED
14. Temperature Adjustment
15. Triac Assy
16. Server Sensor
cycle can be initiated.
If the ready light goes out during a brew cycle,the
cycle will continue until it is completed. You must wait
until the ready light glows before starting another brew
10
cycle.
LIQUID LEVEL CONTROL SYSTEM DOES NOT
OVERFLOW CUP FULL
(4)
NO
DISCONNECT LEVEL PROBE
(7)
VOLTAGE PRESENT AT
SOLENOID VALVE
(12)
NO
REPLACE
P1009
CONTROL
ASSEMBLY (1)
Liquid Level Control Test Procedure:
1. Disconnect brewer from the power source.
2. Check the voltage across terminals 3 & 4 of the
electronic control assembly (1) with a voltmeter.
Connect brewer to power source.The indication
must be:
a.)120 volts ac for two wire 120 volt models,208
volts ac for three wire 120/208 volt models and
240 volts ac for three wire 120/240 volt models.
b.) 200 to 240 volts ac for two wire 200 or 240 volt
models.
3. Disconnect brewer from the power source.
If voltage was present as described, proceed to #4.
If voltage was not present as described, refer to the
wiring diagrams and check the brewer wiring harness.
4. Remove the pink wire from terminal 5 of the
electronic control assembly (1).
5. Check the voltage across terminals 1 & 4 of the
electronic control assembly (1) with a voltmeter.
Connect brewer to the power source. The indica-
tion must be:
a.) 120 volts ac for two wire 120 volt models,
three wire 120/208 volt models and three wire
Page 23
PROBLEM:
REMOVE POWER
YES
DRAIN CUP
(4)
RETRY
YES
YES
DOES WATER FLOW
REPLACE PROBE
(7)
NO
REPLACE
SOLENOID VALVE
(12)
REFILL
27118 100400
Advertisement
Table of Contents
