Zodiac Z250 MD3 Notice D'installation Et D'utilisation page 52

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