Mark GS+ Livret Technique page 14

7.0 Fault codes
Code Error
01 Ignition failure
02 Gas valve relay/T max.
03 Gas valve
10 Sensor diff too high
23 Filters/system fan
25 T max.
31 Too many attempts to restart Flame goes out (3x) when the device is in operation.
42 Choke relay broken
43 Combustion air fan failure
62 Block drain
65 Phase and zero back to front
72 Air out sensor open
73 Unit temp sensor open
78 Air out safety open
80 Air out shorted
81 Unit temp shorted
86 Air out safety shorted
When a different error code displayed on the thermostat appears, press the Reset button. If the fault re-
turns, please contact the vendor of the device.
14
Description
Ignition has failed (three attempts at ignition).
Maximum thermostat is open
Gas valve faulty / Wire connecting the gas valve to the
burner control box is open-circuit or has been incorrectly
connected.
Temperature difference between both outlet temperature
sensors is too high.
Filter is dirty/system fan has suffered a thermal failure
Maximum thermostat is open
Relay of the choke valve is broken
The current speed of the combustion air fan deviates too
much
Condensate drain blocked. Condensate pump failure.
Phase and zero not connected correctly
Outlet temperature sensor interrupted
Ambient temperature sensor interrupted
Outlet temperature sensor interrupted
Outlet temperature sensor has short circuited
Ambient temperature sensor has short circuited
Outlet temperature sensor has short circuited