Moduline HSH E Series User manual

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SERVICE MANUAL Ed.1114
COOKING AND HOLDING SYSTEM with Pc board HSH – HSW –
HHT – HHB – CSC – CSD …E models
LEGEND:
4 KEYS PC BOARD OPERATIONS 4 KEYS ………….......................................................................................................2
4 KEYS PC BOARD DIAGNOSTICS………........................................................................................................................3
8 KEYS PC BOARD OPERATIONS 4 KEYS ………….......................................................................................................4
8 KEYS PC BOARD DIAGNOSTICS………….....................................................................................................................5
SUMMARY OF POSSIBLE MALFUNCTIONS…………………………………..…………………………………………...........6
FAILURES AND RELATIVE TECHNICAL INTERVENTIONS
- Replacing cavity heating element…...…………………………….………………………..…………………………….8
- Replacing cavity temperature probe………….…...……………………………………..………………..……….……11
- Replacing heating element probe…………………………………………………..…………….……………………...13
- Replacing core probe (only model with 8 keys pc board)…………………………………………...……….….…….16
- Replacing Pc board………………………………………………………………………………………..………….…..18
- Setting Pc board parameters……………………………………………………………………………..………………20
- Replacing general fuse…….……….…………………………………………………………..........………………..…20

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4 KEYS PC BOARD
POWER SUPPLY
Description
Type
Name
N - L Power supply 230Vac LINE IN – NEUTRAL IN
PROBE
Probe
Description
Type
Operating Range
Conversion
Range
Range of use
PT1 Heating
element probe PT100 -50°C ÷+500°C -25°C ÷+400°C -20°C ÷+400°C
PT2 Cavity probe PT100 -50°C ÷+500°C -25°C ÷+400°C -20°C ÷+400°C
DIGITAL OUTPUTS
Out
Descrizione
Type
Features
Name
OL Heating element Contact NO 16A AC1 LINE OUT
DISPLAY STATUS AND PROBE TESTS

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You can reach this status by pressing the START/STOP key for long while in the OFF status. The
display shows the chamber probe code “SCA”. By pressing the UP and DOWN keys, you pass to
the heating element probe “SrE”. Pressing START/STOP displays the value read by the indicated
probe; if the probe is in error, “Err” will appear. By pressing START/STOP you exit the viewing of
the value. You may return to the OFF status by pressing the START/STOP key or after a 5 second
timeout.
FIRMWARE REV DISPLAY STATUS
You can reach this status by pressing the ON/OFF key for long while in the OFF status. The
display alternately shows the firmware version and revision code. You may return to the OFF
status by pressing the ON/OFF key or after a 5 second timeout.
4 KEYS PC BOARDS DIAGNOSTICS
CAVITY PROBE MALFUNCTION
The display shows the code Er1.
The cycle in progress is blocked and the buzzer switches on (it can be silenced by pressing a key).
It can be caused by an incorrect connection of the probe or by a failure of the same.
HEATING ELEMENT PROBE MALFUNCTION
The Display shows the code Er2.
The cycle in progress is blocked and the buzzer switches on (it can be silenced by pressing a key).
It can be caused by an incorrect connection of the probe or by a failure of the same.

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8 KEYS PC BOARD
POWER SUPPLY
Description
Type
Name
N - L Power supply 230Vac LINE IN – NEUTRAL IN
PROBE
Probe
Description
Type
Operating Range
Conversion
Range
Range of use
PT1 Heating
element probe PT100 -50°C ÷+500°C -25°C ÷+400°C -20°C ÷+400°C
PT2 Cavity probe PT100 -50°C ÷+500°C -25°C ÷+400°C -20°C ÷+400°C
PT3 Core probe PT100 -50°C ÷+500°C -25°C ÷+400°C -20°C ÷+400°C
DIGITAL OUTPUTS
Out
Descrizione
Type
Features
Name
OL Heating element Contact NO 16A AC1 LINE OUT

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DISPLAY STATUS AND PROBE TESTS
You can reach this status by pressing the “CAVITY TEMPERATURE” key for long while in the OFF
status. The display shows the chamber probe code “SCA”. By pressing the UP and DOWN keys,
you pass to the heating element probe “SrE” and to the core probe “SSP” Pressing START/STOP
displays the value read by the indicated probe; if the probe is in error, “Err” will appear. By pressing
START/STOP you exit the viewing of the value. You may return to the OFF status by pressing the
START/STOP key or after a 5 second timeout.
FIRMWARE REV DISPLAY STATUS
You can reach this status by pressing the “HOLD” key for long while in the OFF status. The display
alternately shows the firmware version and revision code. You may return to the OFF status by
pressing the ON/OFF key or after a 5 second timeout.
DIAGNOSTICS
CAVITY PROBE MALFUNCTION
The display shows the code Er1.
The cycle in progress is blocked and the buzzer switches on (it can be silenced by pressing a key).
It can be caused by an incorrect connection of the probe or by a failure of the same.
HEATING ELEMENT PROBE MALFUNCTION
The Display shows the code Er2.
The cycle in progress is blocked and the buzzer switches on (it can be silenced by pressing a key).
It can be caused by an incorrect connection of the probe or by a failure of the same.
CORE PROBE MALFUNCTION
The Display shows the code Er3.
The cycle in progress is blocked and the buzzer switches on (it can be silenced by pressing a key).
It can be caused by an incorrect connection of the probe or by a failure of the same.

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SUMMARY OF POSSIBLE MALFUNCTIONS
Problem Probable cause Solution
The appliance does not
switch on
No electrical power Restore electrical power
Power fuse blown Replace the blown power fuse
Power cable not connected properly Check power cable connection
PC board faulty Replace PC board
Electric connections faulty Check all electric connections inside
appliance
The appliance switches
on but the chamber
does not heat up
Cables not connected properly Check the cables connection
PC board faulty Replace PC board
Heating element burnt Replace heating element
PC board faulty Replace PC board
A burnt heating element if there are
more than one heating elements in
the appliance
Replace heating element
Cavity probe faulty Replace cavity probe
Heating element probe faulty Replace heating element probe

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Problem Probable cause Solution
The cavity heats up too
much
PC board faulty Replace PC board
Cavity probe faulty Replace cavity probe
Heating element probe faulty Replace heating element probe
Heating element probe in wrong
position
Position heating element probe
correctly
Er1 appears on the
display and the buzzer
switches on
Cavity probe connected incorrectly Reconnect cavity probe
Cavity probe disconnected Connect cavity probe
Cavity probe faulty Replace cavity probe
Er2 appears on the
display and the buzzer
switches on
Heating element probe connected
incorrectly Heating element probe
Heating element probe disconnected Connect heating element probe
Heating element probe faulty Replace heating element probe
Er3 appears on the
display and the buzzer
switches on (only on
models with core
probe)
Core probe connected incorrectly Reconnect core probe
Core probe disconnected Connect core probe
Core probe faulty Replace core probe

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FAILURES AND RELATIVE TECHNICAL
INTERVENTIONS
Before proceeding with the intervention, make sure that the electric cable of the appliance
is unplugged.
Place the appliance on a flat and stable surface.
- REPLACING CAVITY HEATING ELEMENTS
To replace the cavity heating elements, proceed as follows:
1) For machine with door disassemble the door by unscrewing and removing the screw of the
hinge highlighted in the photo at the bottom of the machine. When the screw has been
removed, the hinge and relative pin will slip off without problems and consequently the
door as well.
For models with drawers pull the drawers from the machine.
2) Unscrew the screws at the back of the machine and remove the closing panel. Also
unscrew the 2 screws on the front of the appliance below the front control panel.
Back of the machine
Front of the machine

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3) Unscrew the 2 screws blocking the control panel and disassemble the board as described in
the paragraph “replacing PC board” concerning failures and relative technical
interventions.
4) Place the machine on its side in order to be able to unscrew the screws at the bottom.
5) Place the machine back in the correct position and remove the upper and side sheet steel
cover, making sure not to pull the electric wires. Then remove the thermal insulation
without breaking it.
6) Unscrew the screws of the ceramic clamp of the heating element terminals. Repeat the
operation if you must replace more than one heating element mounted on the same
machine.
Bottom machine

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7) Remove the heating element and mount the new one respecting the previous positioning.
Pay special attention to bend it carefully when positioning it in the curves in order not to
ruin its insulation. If the heating element is longer than necessary, cut it to measure
sheathing the end parts.
8) IMPORTANT: make sure that the tip of the probe is pushed into contact with the heating
element as shown in the photo below. The probe must remain at distance from the sheet
metal of the cavity.
9) Connect the terminals of the heating element to the ceramic clamps as it was originally.
10) Reposition the thermal insulation and close the machine by repeating the operations
described in points 1-2-3-4-5 in the opposite order.
- REPLACING CAVITY TEMPERATURE PROBE
Heating element
terminals
Point of contact

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To replace the cavity temperature probe, proceed as follows:
1) For machine models with door disassemble the door by unscrewing and removing the
screw of the hinge highlighted in the photo at the bottom of the machine. When the screw
has been removed, the hinge and relative pin will slip off without problems and
consequently the door as well.
For models with drawers pull the drawers from the machine.
2) Unscrew the screws at the back of the machine and remove the closing panel. Also
unscrew the 2 screws on the front of the appliance below the front control panel.
3) Unscrew the 2 screws blocking the control panel and disassemble the board as described in
the paragraph “replacing PC board” concerning failures and relative technical
interventions.
Back of the machine
Front of the machine

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4) Place the machine on its side in order to be able to unscrew the screws at the bottom.
5) Place the machine back in the correct position and remove the upper and side sheet steel
cover, making sure not to pull the electric wires. Then remove the thermal insulation
without breaking it.
6) Unscrew the brass threaded fitting securing the probe to the cavity. Then pull the probe
out of the cavity.
Bottom machine

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7) Mount the new cavity probe placing the brass nosepiece between the brass threaded
closing fitting and the bush welded to the cavity.
8) Reposition the thermal insulation and close the machine by repeating the operations
described in points 1-2-3-4-5 in the opposite order.
- REPLACING HEATING ELEMENT PROBE
To replace the heating element probe, proceed as follows:
1) For machine with door disassemble the door by unscrewing and removing the screw of the
hinge highlighted in the photo at the bottom of the machine. When the screw has been
removed, the hinge and relative pin will slip off without problems and consequently the
door as well.
Brass nosepiece
Brass threaded

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For models with drawers pull the drawers from the machine.
2) Unscrew the screws at the back of the machine and remove the closing panel. Also
unscrew the 2 screws on the front of the appliance below the front control panel.
3) Unscrew the 2 screws blocking the control panel and disassemble the board as described in
the paragraph “replacing PC board” concerning failures and relative technical
interventions.
4) Place the machine on its side in order to be able to unscrew the screws at the bottom.
Back of the machine
Front of the machine

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5) Place the machine back in the correct position and remove the upper and side sheet steel
cover, making sure not to pull the electric wires. Then remove the thermal insulation
without breaking it.
6) Unscrew the bracket securing the heating element probe and pull it off. Position the new
heating element probe and remount the anchoring bracket.
IMPORTANT: make sure that the tip of the probe is pushed into contact with the heating
element as shown in the photo below. The probe must remain at distance from the sheet
metal of the cavity.
Bottom machine
Anchoring bracket

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7) Reposition the thermal insulation and close the machine by repeating the operations
described in points 1-2-3-4-5 in the opposite order.
- REPLACING CORE PROBE (ONLY MODEL WTH 8 KEYS PC BOARD)
To replace the core probe, proceed as follows:
1) Disassemble the door by unscrewing and removing the screw of the hinge highlighted in
the photo at the bottom of the machine. When the screw has been removed, the hinge
and relative pin will slip off without problems and consequently the door as well.
2) Unscrew the screws at the back of the machine and remove the closing panel. Also
unscrew the 2 screws on the front of the appliance below the front control panel.
Point of contact

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3) Unscrew the 2 screws blocking the control panel and disassemble the board as described in
the paragraph “replacing PC board” concerning failures and relative technical
interventions.
4) Place the machine on its side in order to be able to unscrew the screws at the bottom.
5) Place the machine back in the correct position and remove the upper and side sheet steel
cover, making sure not to pull the electric wires. Then remove the thermal insulation
without breaking it.
Back of the machine
Bottom machine
Front of the machine

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6) Unscrew the threaded nut which secures the core probe to the cavity. Then pull the probe
out of the cavity. Mount the new core probe making sure to apply silicon between the
cavity and flat washer placed before the threaded locking nut. To guarantee correct drying
and sealing of the silicon, wait 24 hours before switching the machine on and heating the
cooking chamber.
7) Reposition the thermal insulation and close the machine by repeating the operations
described in points 1-2-3-4-5 in the opposite order.
- REPLACING PC BOARD
To replace the PC board, proceed as follows:
1) Unscrew the 2 screws blocking the control panel.
The inside chamber
Threaded nut
Flat washer

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2) Pull out the control panel with the relative PC board first from below as highlighted below.
3) Disconnect the wires connected to the various terminals of the PC board, taking note of
their connection beforehand.
4) Unscrew the 9 self-locking nuts which secure the PC board to the control board and
disconnect it. Position the new one making sure to place plastic spacers between the 2.
Core probe
Cavity temperature
probe
Heating
element probe
Heating
elememt
Power 230V

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5) Screw the self-locking nuts back on. The nuts of the PC board with the terminal board for
connection of the electric wires must be closed firmly without being overly tightened. As
for the small PC board with the display, the nuts must be screwed so that when the various
controls on the board are pressed you feel that the buttons on the circuit board intervene
correctly.
6) Reconnect the electric wires respecting their original connection.
7) Reposition it all inside the machine.
8) Re-screw the 2 screws blocking the control panel.
9) Set the parameters of the new board since all spare PC boards are supplied with the same
setting.
- SETTING PC BOARD PARAMETERS
Despite the fact that whenever a new product is installed it already has its own specific
parameters settled, at times they must be reconfigured. In order to receive the specific
parameters and the procedures to be followed to set them, refer to the Moduline Technical
Assistance Service specifying the serial number of the appliance.
- REPLACING GENERAL FUSE
To replace the general fuse, proceed as follows:
1) Unscrew the 2 screws blocking the control panel.