20
5.7 TABLE OF TROUBLESHOOTING CAUSES
Alarm
Failure
Meaning
Cause
Remedy
code
P1
Probe
technical water
1) Probe interrupted
1) Technical water probe replacement
alarm PB1
Probe
2) Probe shorted
2) Control unit replacement
3) Control unit faulty
P2
Probe
External
1) Probe interrupted
1) External probe replacement
alarm PB2
temperature
2) Probe shorted
2) Replacement of the external probe
probe
3) Q.E. probe connection
connection cable
interrupted
3) Replacement control unit
P3
Probe
External
1) Probe interrupted
1) External probe replacement
alarm PB3
temperature
2) Probe shorted
2) Replacement of the external probe
probe
3) Q.E. probe connection
connection cable
interrupted
3) Replacement control unit
A09
Compressor
High
1) Faulty thermostat
1) Thermostat replacement
thermal
temperature
2) Exhaust Booster
2) External Booster Charging
alarm
thermostat
3) Q.E. thermostat connection
3) Replacement of Q.E.
contact open
thermostat connection cable
A12
Defrost
End defrost
1) Lack of refrigerant gas
1) External Booster Charging
error
for maximum
2) Extreme outdoor conditions 2) Change of parameters DF03 and DF04
alarm
time
3) Condensate drain blocked
3) Make sure that condensation
4) PB3 probe out of range
flow out regularly
4) PB3 probe replacement
ALOC
Low or
Power supply
1) Power supply
Contact the electricity supplier
high voltage voltage
below 220 V
to have the exact voltage
alarm
out of safety
2) Power supply
values restored
range
above 253 V
E01
High pressure Refrigerant gas Accumulation of
Fill the accumulation
refrigerant gas pressure above drained technical water
with technical water
alarm
42 bar
E02
Low pressure
Gas pressure
1) Faulty evaporator fan
1) Replace the evaporator fan
alarm for
below
2) Exhaust Booster
2) Charge refrigerant gas in the Booster
refrigerant
2,7 bar
3) Presence of evaporator ice
3) Oncheck defrost parameters
gas circuit
