section 11: fault finding
Page 55
Error
code
Error
method of check
troubleshooting
figure/
table
Error
reset
C8
Main PCB error
Main PCB
Turn off the power supply, wait for about
3 minutes, then power up again
If the same error code appears,
Main PCB should be replaced
-
Power
OFF
Check loose cable connections and
contacts of reactor
E4
Outgoing water
temp. sensor
error
Sensor, Temp.
Outgoing water
Check the resistance by tester
If the sensor is faulty, it should be
replaced
Figure
11-14
Auto
E5
Return water
temp. sensor
error
Sensor, Temp.
Return water
Check the resistance by tester
If the sensor is faulty, it should be
replaced
FU
High pressure
switch is
operating
Outside air
recirculation
Check temperature difference of
Outgoing/Return water (see Monitor
display function)
Large difference means flow rate is too
low
Make sure the position doesn’t block the
air inlet and outlet
-
Manual
Clogged water
circuit
Remove the blockage, then restart
operation
P1
Pump error
Pump (*2)
Check the voltage of Pump
If the voltage is normal, Pump should be
replaced
If the voltage is abnormal, Main PCB
should be replaced
Figure
11-5
Main PCB
Clogged the
water
Pump and/or
water circuit
Check the pump and water circuit
Remove the blockage, then restart
operation
-
P3
High pressure
switch error
High pressure
switch
Check loose cable connections and
contacts
If the same error code appears, high
pressure switch should be replaced
-
Power
OFF
U1
Compressor
overheat
protection relay
operation
Compressor
overheat
protection relay
Check the resistance by tester
If the compressor overheat protection
relay is blown, it should be replaced
Figure
11-9
Manual
Gas leakage
Check the service valve and refrigerant
circuit (pipe)
Correct refrigerant once, then recharge
with prescribed mass
-
Water not getting warm
Fuse CF2
0639U : 250V
T3.15A
1039U : 250V
T3.15A
1639U : 250V T5A
Check the electric continuity of Fuse
CF1 by tester
If CF2 is blown,it should be replaced
and check the resistance of 4way valve
and the resistance of Defrost heater by
tester
Figure
11-8
-
4way valve
Check the resistance of 4way valve by
tester
If 4way valve is blown,it should be
replaced
Figure
11-6
Defrost heater
Check the resistance of Defrost heater
by tester
If Defrost heater is blown,it should be
replaced
Figure
11-7
Short cycle
(insufficient air
circulation)
Check the blockage of air inlet & outlet
Ensure the installation position to avoid
blockage of air inlet & outlet
-
Sensor,Temp.
Outgoing water
and Return water
Check the resistance by tester
If any of these sensors is faulty, it should
be replaced
Figure
11-14
Gas leakage
Check the service valve and refrigerant
circuit (pipe)
After fixing the leakage point,collect
the refrigerant once,then recharge with
prescribed mass
-
Clogged water
circuit
Check temperature difference of
Outgoing/Return water (see Monitor
display function)
Large difference means flow rate is too
low
Remove the blockage,then restart
operation
-
Summary of Contents for Aerona3 HPID12R32
Page 71: ...NOTES Notes Page 71...
