USER MANUAL – Release 1.2 of 01/01/2010 Page 184 of 191
ACF1
Unit configured as cooling and heating (CF2 = 3) and circuit reverse valve not
configured
Incorrect combination in the values of the defrost parameters (dF26/dF27)
See table in Defrost chapter
Parameters dF26 and/or dF27 equal to zero with unique ventilation (FA05 =
0) and anti-freeze management in defrost mode disabled (dF33 = 0)
ACF2
Unit configured for the ON/OFF or proportional control of the condensation
without the configuration of the relevant probe
(1 probe per circuit if separate condensation, at least 1 probe if unique
condensation)
In the case of proportional regulation at least one of the following rules is not
respected:
FA10 + FA12 + FA13 < FA11
FA13 < FA14
FA08 < FA16 < FA09
In the case of proportional regulation with heating enabled at least one of the
following rules is not respected:
FA19 + FA22 + FA21 < FA20
FA22 < FA23
FA17 < FA24 < FA18
In the case of ON-OFF regulation the following rule is not respected:
FA10 < FA11 < FA25 < FA26
In the case of ON-OFF with heating enabled regulation the following rule is
not respected:
FA19 > FA20 > FA29 > FA30
If heating is enabled and defrost enabled there is no
condensating/evaporating probe per circuit
If PWM regulation is enabled (OUT5 and/or OUT6 configured as PWM
output) continuous power supply has been selected (SP13 = 2)
ACF3
Two digital/analogue inputs configured with the same function or configured
without the adequate resources (e.g. compressor 3 thermal overload
configured but compressor 3 not configured)
ACF4
• SP07 = 1 and digital input not configured or SP07 = 2 and no NTC
probe configured as external air temperature
• CF04 ! 0 no Condensing unit digital input configured.
• CF04 ! 0 and condensing unit enabling input configured along with at
least one cooling/heating request digital inputs.
• CF04 ! 0 and cooling/heating capacity request configured
incongruently with the configuration of the compressors/unloaders
relay outputs
ACF5
If circuits n° 2 – 3 – 4 are not configured and the resources have been
configured (pump down relay, heaters, inversion valve, outdoor fans, heat
recovery, auxiliary)
ACF6
The total number of steps supplied compressors in the 4 circuits is > 16
The first circuit has more than 4 compressors and the other circuits are also
defined
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