6 720 800 095 (2014/05)
Therm 6000S
36 | Problem solving
10 Problem solving
10.1 Problem/Cause/Solution
To remove error code from the display, press
the reset button.
Display
Cause
Solution
Fault in the flue gas limiter.
Temperature above 110 °C
inside the cabinet.
1. Check continuity of the flue
gas limiter (normally closed).
2. Check for flue gas leakage around the top and bottom seals of heat
exchanger, use mirror to check arou
nd the rear as well as the viewing
window.
3. Check venting specifications are me
t. Long vent lengths, venting with
more than three elbows,
blocked vent or combination venting may cause
this failure.
4. Check that flue gas limiter connector and spade connections are
secure.
5. Unplug heater and check the wiring harness connections on the
control board.
Resistance connections are not
correct.
1. Check resistance connection, see Fig. 2, [9].
Backflow temperature sensor
defect - happens if sensor is
disconnected or short circuit.
1. Check backflow temperature sens
or connection, see Fig. 2, [13].
2. Replace exhaust temperature sensor.
Outlet temperatur
e sensor fault
(Temperature below 0 °C or
above 98 °C).
1. Check red wire connections at hot water temperature sensor. Clean
terminals with an eraser. If badly corroded, replace sensor and wire
harness.
2. Sensor may trip if water temp
erature drops below 0 °C to protect
heater from freezing conditions. Any damage due to freezing conditions
is not covered under warranty.
3. Clean the water filter, any dirty in
the faucets and also all the water
filters of the installation.
4. In areas where water has a high
mineral content, pe
riodic descaling
may necessary.
5. Check sensor.
Table 21
* By installer or service technician only.
