Buderus RC35 Operations Instructions download pdf (Page 53)

Logamatic EMS RC35 programming unit - Subject to technical modifications

53

Troubleshooting

10

A2x 829 RC20/RF as

remote

control.

RC20/RF unable to

transmit data to RC35.

Room temperature

control therefore not

possible for this HC.

RC20/RF address

incorrectly allocated in

RC35 or not installed

in RC35.

B Set the operating

unit parameter in

RC35 to RC20/RF.

B Check the

assignment of the

RC20/RF.

A2x 830 Low battery

for wireless

oper. unit

HCx.

No effect if the battery

is replaced in time.

Battery in RC20/RF

for HCx is low.

B Replace batteries.

A2x 839 No wireless

comm. with

oper. unit

HCx.

Wireless

malfunction.

Since the actual room

temperature is

missing, the following

cannot function:

• Room influence

• Switching point

optimisation

The RFM20 operates

with the last values set

on the remote control

unit.

RC20/RF is outside

the range of reception.

B Bring the RC20/RF

within the range of

reception.

Heating system has

been switched off.

B Switch on the

heating system.

When RFM20 was

replaced, the RC20/

RF was not registered

on the new RFM20.

B Register the RC20/

RF (see

documentation for

RC20/RF).

A2x 842 Frost

prot.selected

but no

rem.contr.

HCx.

Since the actual room

temperature is

missing, the following

cannot function:

• Room influence

• Switching point

optimisation

EMS operates with the

last values set on the

remote control unit.

No programming unit /

remote control unit

assigned, although

frost protection is

set to room

temperature.

B Check the

operating unit

parameter.

B Possibly change

over frost

protection to

outside temp.

A2x 843 Room

control

selected but

no

rem.contr.

HCx.

No programming unit /

remote control unit

assigned, although

room temp.

controlled is set.

B Check the

operating unit

parameter.

B Possibly change

over to outside

temp. contr.

SC FC

Events

display

Effect on control

characteristics Possible cause Remedy

Tab. 21 Fault table

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