User Manual

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Building Technologies Division CC1N7491en

18.07.2018

Error code list (cont’d)

QAA73

display of

error code

Meaning of QAA73 text display

Internal

diagno

stics

code

Cause

Error 160 Fan speed threshold not reached 20

Under run of minimum fan speed threshold,

wrong air supply, retry

Error 160 Fan speed threshold not reached 21

5 times under run of minimum fan speed

threshold, wrong air supply, retry after 2 hour

Error 160 Fan speed threshold not reached 22

Fan speed on standstill in standby not

reached

Error 160 Fan speed threshold not reached 23

Fan speed threshold in ignition phase not

reached

Error 160 Fan speed threshold not reached 24

Fan speed threshold in ignition phase with

delayed restart not reached

Error 160 Fan speed threshold not reached 25 Ignition fan speed threshold not reached

Error 161 Maximum fan speed exceeded 20 Exceeding of maximum fan speed NoGmax

Error 164 Error heating circuit flow / pressure switch 1

Pump OFF, but flow / pressure switch does

not open

Error 164 Error heating circuit flow / pressure switch 2

Pump ON, but flow / pressure switch does not

Error 167 Heating power limit exceeded / under run 20

Exceeding maximum heat capacity in

operating mode

Error 167 Heating power limit exceeded / under run 21

Under run minimum heat capacity in

operating mode

Error 168 Lockout of device active 0 Burner control communication timeout

Error 180 Chimney sweep function active 0 --

Error 181 Regulator stop function active 0 --

Error 183 Remote reset test mode active 20 Remote reset test mode 1 active

Error 183 Remote reset test mode active 21 Remote reset test mode 2 active

Error 193 Flatness test 1 failed 20 Flatness test 1 failed