Display codes
6720814332 (2018/04)
45
9 A
3 6 1
3
The burner control unit that has been fitted is not
compatible with the KIM.
▶ Check the numbers on the burner control unit.
▶ Fit a KIM with the correct KIM number.
9 U
2 3 3
3
The burner control unit or the KIM is faulty.
▶ Check plug and wiring of the burner control unit.
▶ Check the operating characteristics of the boiler by replacing the
burner control unit.
A 3
3 1 7
3
Short circuit in the flue gas temperature sensor
contacts.
▶ Check the function of the flue gas temperature sensor by replacing
the component.
b 7
2 5 7
3
The burner control unit or the KIM is faulty.
▶ Check plug and wiring of the burner control unit.
▶ Check the operating characteristics of the boiler by replacing the
burner control unit.
C 1
2 6 4
2
No control signal or power supply to the fan during
operation.
▶ Check plug and cabling of the fan.
▶ Check the function of the fan, replace the component if necessary.
C 4
2 7 3
2
The boiler was switched off for a maximum of
2 minutes because it had been operating
continuously for more than 24 hours. This is a
safety check.
C 6
2 1 5
3
The fan speed is too high.
▶ Check plug and cabling of the fan.
▶ Check the operating characteristics of the boiler by replacing the fan.
▶ Check the plug of the burner control unit.
▶ Check the operating characteristics of the boiler by replacing the
burner control unit.
C 6
2 1 6
3
The fan speed is too low.
C 7
2 1 4
3
The fan does not run during the start phase (
- -
).
C 7
2 1 7
3
The fan speed is irregular when starting up.
C E
2 0 7
2
Water pressure is too low.
▶ Top up heating system with water until a pressure of 2 bar is
reached.
▶ Check the expansion vessel.
▶ Check the heating system for leaks.
▶ Check the wiring and function of the pressure sensor.
C E
2 6 6
3
Pump test failed.
▶ Check the water pressure of the boiler, vent the heating system and
the boiler.
▶ Check whether it is possible to achieve sufficient flow in the heating
system.
▶ Check function of the pump.
▶ Check function and cabling of the pressure sensor.
▶ Check the operating characteristics of the boiler by replacing the
faulty component.
d 1
2 4 0
3
The contacts of the boiler return temperature
sensor have short-circuited.
▶ Check the water pressure of the boiler, vent the heating system and
the boiler.
▶ Check whether it is possible to achieve sufficient flow in the heating
system.
▶ Check plug and cabling of the boiler return temperature sensor.
▶ Check the function of the boiler by replacing the boiler return
temperature sensor.
d 1
2 4 1
3
The contacts of the boiler return temperature
sensor have been interrupted.
d 3
2 3 2
The external switching contact has opened.
▶ Check the jumper at the connection of the external switching
contact.
▶ Check the external switching contact.
d 4
2 1 3
The actual temperature recorded by the flow
temperature sensor or return temperature sensor
is rising too quickly.
▶ Check the water pressure of the boiler, vent the heating system and
the boiler.
▶ Check whether it is possible to achieve sufficient flow in the heating
system.
▶ Check the cabling to the pump and corresponding sensors.
Replace the faulty component if necessary.
d 4
2 7 1
2
Actual temperature differential between flow and
safety temperature sensor is too high.
▶ Check the water pressure of the boiler, vent the heating system and
the boiler.
▶ Check whether it is possible to achieve sufficient flow in the heating
system.
▶ Check the operating characteristics and cabling of the pump and
corresponding sensor. Replace the faulty component if necessary.
Code
Code
type Designation
Remedy
Table 19 Operating and fault codes
Summary of Contents for Worcester GB162-100 V2
Page 49: ...6720814332 2018 04 49 Notes ...
