Atag Q 25S Installation & Servicing Instructions

Installation & Servicing Instructions ATAG Q-Series
40
14 Error indication
A detected error is indicated on the display by means of blocking or error messages. A
distinction should be made between these two messages due to the fact that blocking
can be of a temporary nature, however, error messages are xed lockings. The control
will try its utmost to prevent locking and will temporarily switch off the unit by blocking it.
Hereunder is a list of some messages.
Blocks
with a number in the last 2 positions.
Block 01:
External safety contact cut off
Block 11:
Maximum DT of ow and return sensor in central heating has repeatedly been exceeded. During
the block normal operation of the hot water supply is possible. The pump continues to operate at minimum
capacity during the block.
Block 12:
Maximum DT of ow and return sensor in domestic hot water has repeatedly been exceeded.
During the block normal operation of the central heating installation is possible. During the block the
pump continues to operate at minimum capacity.
Block 60:
Incorrect parameter setting of the minimum or maximum power.
Block 67:
A DT has been detected between ow and return sensor whereas the burner is not in operation.
After the DT has disappeared the block will disappear.
Block 80:
Maximum ow temperature T1a has been exceeded (only Q60S). The block will not be cancelled
until the ow temperature has decreased 30K.
Block 81:
The ow sensor T1a (only Q60S) is not connected although it was connected to the control. The
burner is blocked until the ow sensor is reconnected.
Block 82:
The ow sensor has short-circuited (only Q60S), heat requirement blocked and pump capacity at
minimum.
Block 85:
The control has not detected a water ow. The venting cycle is started. If during this cycle water
ow is detected, the venting cycle is ended and the burner is released.
Error with a number in the last two positions.
Error 00: Poor ame-forming
Error 02: no ame-forming. Boiler failed to spark, lite or detect a ame picture.
Error 04: adjustment or error for voltage interruption
Error 05: adjustment fault
Error 18: maximum ow temperature exceeded
Error 19: maximum return temperature exceeded
Error 28: number of revolutions not reported back from fan
Error 69: no or incorrect display
Error 80: maximum ue gas sensor temperature exceeded
FUSE: Fuse 24V circuit defective

Atag Q 25S Specifications

General

Brand	Atag
Model	Q 25S
Category	Boiler
Language	English