Blomberg BWOS 30100 User manual

BWOS 30100 SERVICE MANUAL
1
CONTENTS
1.
SERVICING REQUIREMENTS
1.1
HEALTH & SAFETY
1.1.1
Electrical Safety
1.1.2
Good Working Practices
1.1.3
Insulation Test
1.1.4
Sheet Metal Edges
1.2
SPECIAL TOOLS & MATERIALS
1.2.1
Tools
1.2.2
Materials
2.
TECHNICAL OVERVIEW
2.1
OVEN SPECIFICATIONS
2.1.1
Oven Weight
2.1.2
Power Rating
2.2
SERIAL PLATE
2.2.1
Location
2.2.2
Model and Serial Number
2.3
COMPONENT SPECIFICATIONS
2.3.1
Heating Elements
2.3.2
Motors
2.3.3
Electric Components
2.4
SYSTEM DESCRIPTION
2.5
OVEN MODEL CONFIGURATION
2.6
MANUAL TEST
2.6.1
How to Verify the Correct Selection
2.6.2
How to Check Single Oven Hardware
2.6.3
Power Supply 208v Voltage Selection
2.7
DESCRIPTION OF ELECTRONIC CONTROL

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3.
USER MANUAL
3.1
CONTROL PANEL
3.1.1
Command Keys
3.1.2
Display
3.1.3
Knobs
3.2
OVEN MODES
3.3
GENERAL OVEN INFORMATION
3.3.1
Flashing Symbols or Numbers
3.3.2
Beeps
3.3.3
Fast Preheat
3.3.4
Lock Symbol
3.3.5
Safety Door Lock
3.3.6
Power Failure
3.3.7
Default Settings
3.3.8
F Failure Number Codes
3.3.9
Convection Fan
3.3.10
Component Cooling Fan
3.4
SETTING THE CLOCK AND TIMER
3.4.1
To Set the Clock
3.4.2
To Set the Timer
3.5
SELECTING THE OVEN MODE
2.8
FAULT NUMBERS
2.9
OVEN SAFETY FUTURES
2.9.1
Child –Safe Locking System
2.9.2
Over Heating sensor
2.9.3
Thermostat
2.9.4
Double –Speed Thermostat
2.9.5
Safety Thermostat

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3.5.1
Convection Cavity Sequence
3.5.2
Temperature Selector
3.5.3
Using Oven Light
3.6
TIME OVEN MODE OPERATION
3.6.1
To Set Time Mode
3.6.2
To Delay the Start of a Timed Mode
3.7
SPECIAL FEATURE FUNCTION
3.8
SABBATH MODE INSTRUCTION
3.9
SETTING THE SELF-CLEANING
3.9.1
To set the Self Clean Mode
3.9.2
To change the Clean Time
3.9.3
To Delay the Start of Clean
3.10
OVEN DOOR REMOVAL
3.10.1
To Remove Door
3.10.2
To Replace Door
3.11
REPLACING AN OVEN LIGHT
4.
TROUBLE SHOOTING GUIDE
4.1
ERROR MESSAGE
4.2
OVEN NOT OPERATIVE
4.3
COOLING FAN PROBLEMS
4.4
CONVECTION FAN PROBLEMS
4.5
DOOR LOCK PROBLEMS
4.6
OVEN LIGHT PROBLEMS
4.7
SELECTORS PROBLEMS
4.8
DISPLAY PROBLEMS
4.9
DOOR HINGES PROBLEMS
4.10
BAD COOKING PERFORMANCE

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5.
ELECTRIC DIAGRAM
5,1
SINGLE OVEN - MULTIFUNCTION
6.
EXPLODED PARTS
6.1
SINGLE OVEN 30”
7.
COMPONENT REPLACEMENT AND ADJUSTMENT
PROCEDURE
7.1
OVEN REMOVAL
7.2
COOLING FAN MOTOR SUBSTITUTION
7.3
---
7.4
CONVECTION FAN MOTOR SUBSTITUTION
7.5
RING ELEMENT SUBSTITUTION
7.6
UPPER ELEMENT SUBSTITUTION
7.7
LOWER ELEMENT SUBSTITUTION
7.8
LOCK DOOR MOTOR SUBSTITUTION
7.9
LOCK DOOR MOTOR SWITCH SUBSTITUTION SOLUTION
7.10
LOOK DOOR SWITCH SUBSTITUTION
7.11
DOOR GASKET SUBSTITUTION
7.12
RESISTOR 78Ω SUBSTITUTION
7.13
SAFETY THERMOSTATS SUBSTITUTION
7.14
PROBE TEMPERATURE SUBSTITUTION
7.15
DOOR HINGES SUBSTITUTION
7.16
DOOR HINGES BOX SUBSTITUTION
7.17
POWER BOARD SUBSTITUTION
7.18
TEMPERATURE OR FUNCTION SELECTORS
7.19
DISPLAY BOARD SUBSTITUTION
7.20
DOOR EXTERNAL GLASS SUBSTITUTION

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7.21
DOOR INTERNAL GLASS SUBSTITUTION
1.
SERVICING REQUIREMENTS
1.1
HEALTH & SAFETY
Note: When servicing the BLOMBERG oven, health and safety issues must be considered at
all times. Specific safety issues are listed below with their appropriate icon. These are
illustrated throughout the service information to remind service people of the health and
safety issues
1.1.1
Electrical Safety
WARNING! TO AVOID ELECTRIC SHOCK!
Do not attempt to service this oven without suitable training
and qualifications.
Ensure the main power has been disconnected before servicing any
part of the oven. If the power is required to be on for electrical fault
finding, then extreme care should be taken not to make contact with
electrical components other than with testing probes.
Ensure the oven is turned off when removing any electrical component
or connection.
1.1.2
Good Working Practices
Ensure the work areas are kept tidy and free of hazards while servicing
the oven. On completion of the servicing, ensure the oven and work
areas are left clean and tidy.
1.1.3
Insulation Test
Megger test to check insulation.
1.1.4
Sheet Metal Edges
When working around cut sheet metal edges use appropriate gloves or
protection to eliminate the chance of receiving a laceration.
1.2
SPECIAL TOOLS & MATERIALS
1.2.1 Tools
1.2.2 Materials
7.5V Power
Screw/Nut
Driver
Recommen
ded
3” socket
extension
bar
Ceramic spacers
Ceramic fiber gasket for upper element
Ceramic fiber gasket for ring element
Nylon spacers for display board

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7mm
socket
10 mm
socket
12mm
socket
Flexible
shaft
socket
extension
#1 and #2
Short
Phillips
Screw
driver
Digital
power
meter
(Voltage –
Current)
Static strap
2.
TECHNICAL OVERVIEW
2.1
OVEN SPECIFICATIONS
2.1.1
Oven Weight
Single 30”
lbs /Kg =148/67
2.1.2
Power rating
TECHNICAL DATA
OVENS
Electrical Ratings and Maximum Connected Load
@ 240 Volts 60Hz
@ 208 Volts 60Hz
Dimension
TYPE
Amperes
Watts
Amperes
Watts
BWOS
30100
30"
(76cm)
PIRO
15,6
3625
17,4
3529

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2.2.1
Location
The product serial number plate is located on the left side profile trim
2.2.2
Model & Serial Number
The numbers printed on the plate contains the following information:
2.3.1
Heating
Elements
Volts
Freq.
Watts
Note
Piro 30”
Broil
240
--
3500
Bottom
240
--
3000
Ring
240
--
2500
Additional
208
--
775
2.3.2
Motors
Volts
Freq.
Watts
Note
Convection Fan
120
60
45
Cooling Fan
120
60
40
Door Lock Motor
100/120
50/60
3
2.3.3
Electric
Components
Volts
A
Watts
Note
Door Lock Motor Switch
250
16
--
Lamp
120
--
25
Door Lock Switch
250
16
--
Cooling Fan Resistor
--
--
--
78Ω
Safety Thermostat
250
16
--
Cooling Fan Thermostat
250
16
--
Probe Temperature
5V
--
--
2.2
SERIAL PLATE
2.3
COMPONENT SPECIFICATIONS

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ELECTRONIC CONTROL. The control consists of a main power board and a display board. An
additional power board is derived from the main one removing the power supply parts. It has all
the functions of the main one to drive the lower cavity in a double oven. The main power board
provides the voltages to the other boards (GND, -5V and -24V for the relays to the lower power
board only).
The three boards share a I2C communication bus (Data and Clock).
COOKING MODE & TEMPERATURE SELECTORS. All ovens have one selector for the cooking
modes and one for the set temperature, per every cavity. The cooking mode selector has 4
positions for thermal cavities, 9 for multifunction ones.
TEMPERATURE SENSOR. There is one Pt1000 sensor per every oven (two in a double, of
course), fixed on the rear wall outside the cavity.
HEATING ELEMENTS. Four heaters are available in multifunction ovens while the ring element is
missing in the thermal ones. They are combined together in different ways, depending on the
selected mode, but the maximum power never overtakes 3500W.
DESCRIPTION
30” & 27”
24”
UPPER ELEMENT
3500W at 240V
3000W at 240V
LOWER ELEMENT
3000W at 240V
2100W at 240V
RING ELEMENT
2500W at 240V
2500W at 240V
UPPER EXTERNAL
ADDITIONAL ELEMENT
775W at 208V (meaning
1032W at 240V).
NOT AVIABLE
CONVECTION FAN. This fan is available in multifunction cavities; it works always at the same
speed in all convection modes, self-clean and dehydrate.
COOLING FAN SYSTEM. A cooling fan keeps the internal parts temperature within acceptable
values, and removes smoke from the cavity through the catalyser. A resistor connected in series
reduces the voltage on the fan motor and consequently the fan speed. There is a 70°C by-pass
thermostat that shorts this resistor when the temperature overtakes the threshold, switching the
cooling fan into its full speed. This normally occurs during self-clean only.
OVEN LIGHTS. Halogen is 120V. They turn on when a cooking mode starts or when the door is
open. It’s also possible to switch the lights on manually by pressing the light button.
DOOR LATCH SYSTEM. A motor actuates the latch mechanism to lock or unlock the door. The
motor always rotates in the same direction, and it’s the mechanism that determines the locking or
unlocking phases. They take about the same time to complete the half cycle. The door micro
switch is checked every time the latch starts to verify that the door is actually closed. If the door is
open, the latch icon flashes until the door is closed. A changeover micro switch placed right on the
motor shaft and actuated by a 180° cam provides the electronics with the latch position
information
2.4
SYSTEM DESCRIPTION

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Resistor R49, R51, R52
on the display board
must be configured
properly, according to
the oven model, before
installing the display
board in the oven.
NEVER CUT
RES1
CUT RES2 in
SINGLE
OVENS.
The manual test procedure must be completed and confirmed as per the instructions in this
section. If the control has never been configured before, the display shows F11 Err at power
up. Once a configuration has been accepted, the failure disappears.
At every POWER-UP, the control runs a latch auto-test cycle. The lock icon flashes while
the latch is moving.
Hold [STOP] and [SET CLOCK] button at the same time, for about 3 seconds,
and check that all the display elements and the buzzer turn on for about 5
seconds.
Press [+] to enter test mode then press [+] to get into the next step. Press [-] to
come back to the previous one.
Check the display board SOFTWARE VERSION (d40).
Check the main power board SOFTWARE VERSION (P34).
Check the lower oven power board SOFTWARE VERSION (P34) (DOUBLE
OVENS ONLY).
Check whether the oven model has been correctly detected.
(OTHERWISE CHECK WHETHER THE CONFIGURATION RESISTORS HAVE BEEN SET
PROPERLY, AS DESCRIBED AT THE BEGINNING).
IMPORTANT: The MANUAL TEST procedure can be activated only within 5 minutes
after power on.
To enter in the MANUAL TEST follow the same procedure as the Configuration section 2.5
2.6.1 How to verify the correct selection
At power-up, the control runs a latch auto-test; both lock symbols flash while the
correspondent latches are moving. Wait for the auto-test end. When the control is powered
for the first time the display shows:
2.5
OVEN MODEL CONFIGURATION
2.6
MANUAL TEST

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F11 Err
Ignore this message and hold [stop] and [set clock] buttons for about three seconds
to start the test.
All the display elements and the buzzer turn on for about 5 seconds then the control
displays
tESt ---
Always press [+] button to proceed to the following step.
Verify the software versions of display and power boards.
Verify that the oven model has been correctly detected by the control, otherwise
check the configuration resistors.
Display
Model
Single 30” multifunction
Verify that the meat probe optional feature is disabled.
Prob Off
Always press [+] button to proceed to the following steps.