No.
Fault code
Fault
Cause/Remedy
5
4
3
2
1
05
∘
∘
●
∘
●
Processor temperature
sensor not connected
(if enabled)
Check sensor connection;
replace sensor
06
∘
∘
●
●
∘
Processor temperature
sensor short circuit (if
enabled)
07
∘
∘
●
●
●
Outside temperature
sensor not connected
(if enabled)
Check sensor connection;
replace sensor
08
∘
●
∘
∘
∘
Outside temperature
sensor short circuit (if
enabled)
09
∘
●
∘
∘
●
Suction gas tempera-
ture sensor not con-
nected (if enabled)
Check sensor connection;
replace sensor
10
∘
●
∘
●
∘
Suction gas tempera-
ture sensor short cir-
cuit (if enabled)
11
∘
●
∘
●
●
Processor fault
Controller problem: Check
the connecting cable and
jumper settings; replace con-
troller
12
∘
●
●
∘
∘
EEPROM faulty
Device operates with ROM
parameters; replace control-
ler
13
∘
●
●
∘
●
DC undervoltage
Check the voltage at the ex-
ternal unit
14
∘
●
●
●
∘
DC overvoltage
15
∘
●
●
●
●
AC undervoltage
16
●
∘
∘
∘
∘
Communication error
Incompatible controllers of
the internal device and the
external unit: Replace the
controller of the internal de-
vice
17
●
∘
∘
∘
●
No communication
Check the connecting cable
between the internal device,
the external unit and earth
18
●
∘
∘
●
∘
Non-approved external
unit
Diagnosis
(cont.)
20
Troubleshooting
5692
689
GB