Control Stop Or Lock-Out; Error Code Memory - REMEHA Avanta 12v Installation & Service Manual

Temperature/resistance diagram
25000
20000
15000
10000
5000
0
10 20 30 40
fig. 60 Sensor resistance graph
50 60 70 80 90
temperature in °C
Sensor resistance
4.3

Control stop or lock-out

The code d8 , d5 or d9 can appear in the display.
• Code d8 is a control stop and will appear if the measured
flow temperature (t1) is higher than the flow
perature set (T
automatically once the flow temperature falls below the flow
temperature set.
• Code d5 is a control stop from 3 till 10 minutes and
appears if the set flow temperature (t1) has already been
reached and the heating demand still exists.
• Code d9 is a lock-out and appears if the maximum tem-
perature rise is exceeded or if the dT between the supply
and return temperature ≥ 22°C or a rate of rise in the flow
temperature > 2,7°C/sec. and also at a boiler-start with noth-
100
rough flow or insufficient water. The boiler will try to restart
after 10 minutes.

Every 10 minutes the boiler will try to restart until the cause
has been removed.
• Code d9 is a lock-out and can appear in the following
situation:
- the shut down input (between terminals 5 and 6 on X9)
has been activated (= opened).

The lock-out will disappear once the cause has been removed!
4.4

Error code memory

The Remeha Avanta control unit has an error code memory,
in which the last 16 errors are stored. In addition to the error
code (é and a number xx).
The following data is also stored:
• the number of times the error occurred (n and a number
xx)
• the operating status of the boiler (5t and a number xx)
• the flow temperature (t1 and the value xx) return tem-
perature (t2 and the value xx) at the time the error
occurred.
To get access to the error memory, access code must be
entered.
49
flow). The boiler will start working again
set
tem-