21
4.2 I Error code display
•
: Actions to be performed by a qualified technician only.
If an error occurs, the
icon is displayed and an error code replaces the temperature indications, see table below to
find the possible causes.
Display
Possible causes
Solutions
Er1
IPM excessive current
IPM module failure
Replace the inverter module
Er2
Compressor failure
Compressor failure
Replace the compressor
1b
DC bus voltage too low
Input voltage too low/PFC module failure
Check input voltage
Replace module
Er26b
AC input voltage too high
Input three-phase unbalance
Check the input three-phases voltage
Er2b4
DC input voltage too low
Input voltage too low
Check input voltage
Er288
IPM temp too high
•
Fan motor failure
•
Air duct blockage
Check fan motor
Chack air duct
Er03
Flow sensor malfunction
Insufficient water in heat exchanger
Check your water circuit operation and
the opening of the by-pass valves
Sensor disconnected or defective
Reconnect or replace sensor
Er04
Antifreeze protection
Protection activated when the ambient
temperature is too low and the appliance is
on standby
No intervention necessary
Er05
High pressure protection
Insufficient water flow
Check water pump operation and
openings of by-pass inlet/outlet valves
Excess refrigerant gas
Check and readjust the refrigerant
volume
Defective 4-way valve
Replace the 4-way valve
High pressure switch disconnected or
defective
Reconnect or replace high pressure
switch
Er06
Low pressure protection
Insufficient refrigerant gas
Check and readjust the refrigerant
volume
Defective 4-way valve
Replace the 4-way valve
Low pressure switch disconnected or
defective
Reconnect or replace low pressure
switch
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