Troubleshooting
63
CS3000 AWP – 6721852570 (2023/04)
• Condenser high temperature;
• High temperature difference between the input and output water;
• Antifreeze protection;
• Drain temperature sensor malfunction;
• Low evaporator temperature;
• Frequency protection by voltage;
• Compressor inverter malfunction;
• Fan motor protection;
• Water return high temperature, in cooling;
• Low pressure antifreeze protection;
• High temperature of inverter compressor module.
When the unit fails or is in protection, the water pump continues working
(except for water flow alarm, voltage protection, phase sequence
protection).
When the master unit is in protection, only the master unit stops and the
other units carry on working.
When a slave unit is in protection, this unit stops and the other units are
not involved.
If the master unit fails, the slave units also stop working.
Temperature sensors
All temperature sensors are classed as faulty when the voltage on the
corresponding input is lower than 0.05 V or higher than 4.95 V.
After an error has been signalled, all units stop. The error is eliminated
after the sensor has been restored.
Error code Description
1E5 Condenser temperature probe T3A fault
1Eb Antifreeze probe Taf1 fault
1Ed Compressor discharge temperature probe A
1EE Refrigerant temperature probe T6A
1F0 IPM module communication error
1F3 Fan A communication error
1F4 Protection L0 or L1 intervention 3 times in 60 minutes
1F6 Circuit A bus voltage (PTC)
1F9 Faulty probe Tfin1
1FF Fan A motor failure
1H9 Compressor driver A - configuration error
1HE Valve A error
1Pb
Winter anti-freeze protection, insufficient electric
heating reminder
1PP IPM module error, circuit A
1PU Fan A module
2E0 EEPROM error - inverter A module
2E5 Condenser temperature probe T3B fault
2E9 Water pressure detection failure
2Eb Antifreeze probe Taf2 fault
2Ed Compressor discharge temperature probe B
2EE Refrigerant temperature probe T6B
2F0 IPM module communication error.
2F3 Fan B communication error
2F4 Protection L0 or L1 intervention 3 times in 60 minutes
2F6 Circuit B bus voltage (PTC)
2F9 Faulty probe Tfin2
2FF Fan B motor failure
2H9 Compressor driver B - configuration error
2HE Valve B error
2Pb
Winter anti-freeze protection electric heating is
seriously insufficient reminder
2PP IPM module error, circuit B
2PU Fan B module
3E0 EEPROM error - inverter B module
3F3 Fan C communication error
3FF Fan C motor failure
3HE Valve C error
3PU Fan C module
C7 3 times PL
dF Defrosting
E0 EEPROM error - main board
E1 Phases sequence - control from main board
E2
Communication error between main board and
keyboard / communication error between master and
slave (slave displays E2)
E3
“Total” outlet water temperature probe Tw fault (only for
master unit)
E4 Outlet water temperature probe Two fault
E6 Storage temperature probe T5 fault
E7 Room temperature probe T4 fault
E8 Phases sequence
E9 Water flow detection failure
EC Slave unit module reduction
EF Return water temperature probe
EH Auto-test error
EP Drain temperature probe
EU Condenser total temperature probe Tz
F2 Low DSH (discharge super-heating)
Fb Faulty pressure sensor
Fd Faulty suction temperature probe (Refrigerant side)
FP DIP switch for modular unit configuration error
H5 High / low voltage
L0 Module protection
L1 Low voltage
L2 High voltage
L4 MCE error
L5 Compressor speed error
L7 No phase
L8 Variation of frequency higher than 15Hz
L9 Difference of phase frequency higher than 15Hz
P0 High pressure / drain temperature
P1 Low pressure
P2 Total condenser output high temperature Tz
P4 Compressor A in protection
P5 Compressor B in protection
P6 Module error
P7 Condenser high temperature
P8 Reserved
P9 Inlet / outlet water temperature difference
PA Reserved
Pb Winter antifreeze
PC Evaporator low pressure in cooling
PE
Antifreeze protection evaporator low temperature in
cooling
PF Circuit board lock - controller lock/unlock error
PH High room temperature probe T4
PL Tfin module, high temperature
Error code Description
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