Error
Description
Relevant part
Code
Unreasonable
overload
Drop in the
Protective
power supply
measure
voltage
against the
A2
detection of
PCB MAIN
excess DC
current
Temporary power
interruption (in the
event of lightning)
COMPRES-
SOR
CT disconnec-
A3
PCB MAIN
tion
Unreasonable
Protective
overload
measure
against the
Drop in the
A4
detection of
power supply
excess AC
voltage
current
Temporary power
interruption (in the
event of lightning)
Unreasonable
overload
Drop in the
power supply
voltage
Fuse CF6,
CF2
Abnormal
A5
rotation of the
compressor
Temporary power
interruption (in the
event of lightning)
Obstruction in
the PUMP or
in the hydraulic
circuit
COMPRES-
SOR or PCB
MAIN
Intake temper-
INTAKE TEMP.
A6
ature sensor
SENSOR
error
Defrosting
DEFROSTING
A7
temperature
TEMP. SEN-
SOR
sensor error
Section II :: Installation and maintenance
Check the installation room
(air intake and output clog-
ging). Check if excessive gas
has been loaded.
Check the power supply volt-
age (320V).
Operate with the COMPRES-
SOR connector discon-
nected.
-------
Fault is different from the
above cases.
-------
Check the installation room
(air intake and output clog-
ging). Check if excessive gas
has been loaded.
Check the power supply volt-
age (320V).
-------
Check the installation room
(air intake and output clog-
ging). Check if excessive gas
has been loaded.
Check the power supply volt-
age (320V).
6-10kW Unit: Check the elec-
trical continuity of FUSE CF6
13-16kW Unit: Check the
electrical continuity of FUSE
-------
Check the difference be-
tween the water input and
output. A great difference
too low.
Fault is different from the
above cases.
Check the electrical continu-
Check the electrical continu-
103
Solution
Correct the installation position to prevent the air
intake and output from clogging.
If excessive gas has been loaded, recover the
refrigerant and then reload the required mass.
Make sure that the power supply voltage is cor-
rect (230V).
If the same error code appears again, replace the
PCB MAIN.
Disconnect and reconnect the power supply.
The COMPRESSOR must be replaced.
Replace the PCB MAIN board.
Correct the installation position to prevent the air
intake and output from clogging.
If excessive gas has been loaded, recover the
refrigerant and then reload the required mass.
Make sure that the power supply voltage is cor-
rect (230V).
Disconnect and reconnect the power supply.
Correct the installation position to prevent the air
intake and output from clogging.
If excessive gas has been loaded, recover the
refrigerant and then reload the required mass.
Make sure that the power supply voltage is cor-
rect (230V).
If fuse CF6 is blown, replace the PCB MAIN.
If fuse CF2 is blown, replace the PCB MAIN.
Disconnect and reconnect the power supply.
Remove the obstruction and resume operation.
The COMPRESSOR must be replaced.
Replace the sensor if it is faulty.
Replace the sensor if it is faulty.
EN