Bosch MT 10 Service Manual download pdf (Page 25)

25

Troubleshooting

6 720 617 760 (2008/09)

Fault Cause Remedy

Required room

temperature not

achieved.

Thermostatic valve(s) are

not opened sufficiently.

Fully open the thermo-

static valve(s) or ask

your installer to check

the valves.

Central heating temperature

control on the boiler set too

low.

Set the central heating

temperature controll

higher.

Air in the heating system.

Bleed radiators and vent

the heating system.

Required room

temperature

greatly exceeded.

FR 10 installed in an unfa-

vourable location, e.g. exter-

nal wall, near windows, in a

draught etc.

Select a better location

(Æ Chapter 3.1) and ask

your installer to relocate

FR 10.

Excessive room

temperature fluc-

tuations.

Temporary influence of

external heat on the room,

e.g. through insulation, solar

gain, lighting, TV, fireplace

etc.

Select a better location

(Æ Chapter 3.1) and ask

your installer to relocate

FR 10.

Temperature

rises instead of

falling.

Time incorrectly set at the

time switch (accessory).

Check time setting.

Room tempera-

ture excessively

high during OFF

period.

The building retains a lot of

heat.

Select an earlier stop

time on the time switch

(accessory).

Incorrect or

nocontrol.

BUS connection of BUS sub-

scriber faulty.

Ask your installer to

check the BUS connec-

tion and correct if

required, in accordance

with the connection dia-

gram.

Tab. 5

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