Thetford C402C 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

Thetford C402C Specifications

General

Type	Cassette Toilet
Flush Water Tank Capacity	15 liters
Dimensions (H x W x D)	512 x 670 x 400 mm
Weight	8.2 kg
Flush System	Electric
Level Indicator Waste Tank	Yes
Level Indicator Flush Water Tank	Yes
Removable Cassette	Yes
Ventilation	Yes
Battery Operated	Yes
Toilet Seat Rotation	Yes
Waste Holding Tank Capacity	19.3 liters

Summary

Troubleshooting No Flush C402C

Preliminary Checks

Verify fuse integrity and cable connections for the C402C toilet.

Operational Diagnosis

Test pump operation, control panel, and flush tube connection.

Troubleshooting No Level Indication C400

Initial System Checks

Inspect cable connections and test reed switch LED functions.

Component and Tank Checks

Diagnose control panel, float arm, magnets, and holding tank positioning.

Troubleshooting Leakages

Bowl to Holding Tank Leaks

Diagnose leaks between the toilet bowl and holding tank, checking positioning and seals.

Water Tank Leaks

Check for leaks in the drain tubes of the water tank system.

Holding Tank Leakage Points

Vent Button and Spout Leaks

Address leaks originating from the vent button or pour-out spout.

Vent Lid Leak Diagnosis

Troubleshoot leaks around the vent lid by checking the actuator and liquid presence.

Troubleshooting No Flush C402X

Initial Diagnostic Steps

Verify fuse and cable connections for the C402X toilet.

System Functionality Checks

Test pump operation, control panel, and flush tube connectivity.

Troubleshooting No Level Indication C402X

Cable and Reed Switch Checks

Inspect cable connections and test LED functions with a magnet.

Float Box and Tank Positioning

Check float box placement, float movement, and holding tank position.

Troubleshooting No Flush C403L

Basic System Verification

Check fuse, cable connections, and relay for the C403L toilet.

Component and Pump Checks

Diagnose control panel operation, vehicle pump, and flush tube.