Thetford Cassette C-402C User manual

No flush C402C
Before starting, check if the toilet is well connected
see the 12V connection scheme
Check if the fuse is
ok Replace the fuse (part 21766)
Remove the handle
and control panel to
check if the cables
are well connected
Connect the cables
correctly
Do you hear the
pump running Replace the pump
(part 16374)
No
No
No
Check if the control
panel works
perfectly
Replace the control
panel
(part 32320-62)
No
Yes
Yes
Yes
Check if the flush
tube is well
connected
Connect the flush
tube correctly
No
Repair instructions you can find in the repair
instructions chapter and/or on our website
www.thetford.eu
6.200 1/4 05/09

No level indication of the
C400 Holding Tank
Check if the LED
functions by putting
a magnet in front of
the reed switch
Check if the float
arm is well placed
and that both
magnets are in
place
Check if the holding
tank is well
positioned
Reposition or put a new
float arm back in place
(part 32304)
No
Yes
32317-62 SC402X HT REED SWITCH
WHITE (for model C403L)
32317-62 SC402X HT REED SWITCH
WHITE (for model C402X)
32316-62 SC402C HT REED SWITCH
WHITE (for model C402C)
Part number/Description
Yes
Remove the handle
and control panel to
check if the cables
are well connected
Connect the cables
correctly
No
Yes
Replace the
Reed switch
No No Replace the
Control panel
32313-62 for
model C403L
32322-62 for
model C402X
32320-62 for
model C402C
Part number
6.200 2/4 05/09

Leakages
Leakage between the bowl and the Holding tank
Position the Holding
tank in a correct way
Check if the Holding
tank well positioned No
Check if the Lipseal
is ok
Yes
Replace the Lipseal
(part 23721)
No
Contact Thetford
customer service
Yes
Leakage at the Water tank
Check if the blade
mechanism is ok Replace the mechanism
(left version
part 32332-06
right version
part 32331-06)
No
Yes
Check if the drain
tubes leaks Replace the drain tube
(part 51804-74)
Yes
Contact Thetford
customer service
No
6.200 3/4 05/09

Leakage at the Holding tank
Replace the vent
button
(part 32307-16)
Leakage at the vent button
Replace the pour out
spout
(part 32306-06)
Leakage at the pour out spout
Leakage at the vent lid
Open the vent lid to
check if the vent
actuator is still well
placed
Replace the vent
actuator
No
Replace the
automatic vent
(part 32305)
Yes
Check if there is
liquid under the vent
lid
No
Yes
Contact Thetford
customer service
6.200 4/4 05/09

No flush C402X
Before starting, check if the toilet is well connected
see the 12V connection scheme
Check if the fuse is
ok Replace the fuse (part 21766)
Remove the handle
and control panel to
check if the cables
are well connected
Connect the cables
correctly
Do you hear the
pump running Replace the pump
(part 16374)
No
No
No
Check if the control
panel works
perfectly
Replace the control
panel
(part 32322-62)
No
Yes
Yes
Yes
Check if the flush
tube is well
connected
Connect the flush
tube correctly
No
Repair instructions you can find in the repair
instructions chapter and/or on our website
www.thetford.eu
6.201 1/5 05/09

No level indication of the
C400 Holding Tank
Check if the LED
functions by putting
a magnet in front of
the reed switch
Check if the float
arm is well placed
and that both
magnets are in
place
Check if the holding
tank is well
positioned
Reposition or put a
new float arm back in
place
(part 32304)
No
Yes
Yes
Remove the handle
and control panel to
check if the cables
are well connected
Connect the cables
correctly
No
Yes
32317-62 SC402X HT REED SWITCH
WHITE (for model C403L)
32317-62 SC402X HT REED SWITCH
WHITE (for model C402X)
32316-62 SC402C HT REED SWITCH
WHITE (for model C402C)
Part number/Description
Replace the
Reed switch
No No Replace the
Control panel
32313-62 for
model C403L
32322-62 for
model C402X
32320-62 for
model C402C
Part number
6.201 2/5 05/09

No level indication of the
C402X Water tank
Replace the Reed
switch of the water
tank
(part 32330-62)
Check if the LED
functions by putting
a magnet in front of
the reed switch
No
Check if the float
box is well placed
and the float is
moving easily
Check if the holding
tank is well
positioned
Reposition or put a
new float box in place
(part 32330-62)
No
Yes
Yes
Remove the handle
and control panel to
check if the cables
are well connected
Connect the cables
correctly
No
Yes
6.201 3/5 05/09

Leakages
Leakage between the bowl and the Holding tank
Position the Holding
tank in a correct way
Check if the Holding
tank well positioned No
Check if the Lipseal
is ok
Yes
Replace the Lipseal
(part 23721)
No
Contact Thetford
customer service
Yes
Leakage at the Water tank
Check if the blade
mechanism is ok Replace the mechanism
(left version
part 32332-06
right version
part 32331-06)
No
Yes
Check if the drain
tubes leaks Replace the drain tube
(part 51804-74)
Yes
Contact Thetford
customer service
No
6.201 4/5 05/09

Leakage at the Holding tank
Replace the vent
button
(part 32307-16)
Leakage at the vent button
Replace the pour out
spout
(part 32306-06)
Leakage at the pour out spout
Leakage at the vent lid
Open the vent lid to
check if the vent
actuator is still well
placed
Replace the vent
actuator
No
Replace the
automatic vent
(part 32305)
Yes
Check if there is
liquid under the vent
lid
No
Yes
Contact Thetford
customer service
6.201 5/5 05/09

No flush C403L
Before starting, check if the toilet is well connected,
water is available and the vehicle pump is working
well. See the 12V connection scheme
Check if the fuse is
ok Replace the fuse (part 21766)
Remove the handle
and control panel to
check if the cables
are well connected
Connect the cables
correctly
Check if the relais is
ok Replace the relais
(part 20106)
No
No
No
Yes
Yes
Yes
Check if the flush
tube is well
connected
Connect the flush
tube correctly
No
Repair instructions you can find in the repair
instructions chapter and/or on our website
www.thetford.eu
Do you hear the
vehicle pump
running Replace the electric
valve (part 23709)
No
Check if the control
panel works
perfectly
Replace the control
panel
(part 32313-62)
No
Yes
Yes
6.202 1/4 05/09

No level indication of the
C400 Holding Tank
Check if the LED
functions by putting
a magnet in front of
the reed switch
Check if the float
arm is well placed
Check if the holding
tank is well
positioned
Reposition or put a
new float arm back in
place
(part 32304)
No
Yes
Yes
Remove the handle
and control panel to
check if the cables
are well connected
Connect the cables
correctly
No
Yes
32317-62 SC402X HT REED SWITCH
WHITE (for model C403L)
32317-62 SC402X HT REED SWITCH
WHITE (for model C402X)
32316-62 SC402C HT REED SWITCH
WHITE (for model C402C)
Part number/Description
Replace the
Reed switch
No No Replace the
Control panel
32313-62 for
model C403L
32322-62 for
model C402X
32320-62 for
model C402C
Part number
6.202 2/4 05/09

Leakages
Leakage between the bowl and the Holding tank
Position the Holding
tank in a correct way
Check if the Holding
tank well positioned No
Check if the Lipseal
is ok
Yes
Replace the Lipseal
(part 23721)
No
Contact Thetford
customer service
Yes
Check if the blade
mechanism is ok Replace the mechanism
(left version
part 32332-06
right version
part 32331-06)
No
Yes
6.202 3/4 05/09

Leakage at the Holding tank
Replace the vent
button
(part 32307-16)
Leakage at the vent button
Replace the pour out
spout
(part 32306-06)
Leakage at the pour out spout
Leakage at the vent lid
Open the vent lid to
check if the vent
actuator is still well
placed
Replace the vent
actuator
No
Replace the
automatic vent
(part 32305)
Yes
Check if there is
liquid under the vent
lid
No
Yes
Contact Thetford
customer service
6.202 4/4 05/09