Check Points, Maintenance and Troubleshooting
Troubleshooting for Problem while Operation
01
Problem in Remote Room Air sensor
02
Problem in Refrigerant (Inlet side) sensor
06
Problem in Refrigerant (Outlet side) sensor
08
Problem in Water Tank sensor
13
Problem in Solar-thermal sensor
16
Problems in sensors
17
Problem in Water-inlet sensor
18
Problem in Water-outlet sensor
19
Problem in Water-interlim sensor
03
Bad communication between control panel
and indoor uni
05
Bad communication between Indoor unit
and Outdoor unit
53
09
PCB Program (EEPROM) Fault
14
Problem in Flow Switch
15
Water pipe overheated
20
Thermal fuse is damaged
44
Problem in outdoor temperature sensor.
• Incorrect connection between
sensor and PCB
• PCB fault
• Sensor fault
• Incorrect connection between
sensor and PCB
• PCB fault
• Sensor fault
• The connector for transmission
is disconnected
• The connecting wires are
misconnected
• The communication line is
broken
• Outdoor PCB is abnormal
• Indoor PCB is abnormal
• Electrical or mechanical damage
a the EEPROM
• Flow switch is open while
internal water pump is working
• Flow switch is closed while
internal water pump is not
working
• Flow switch is open while DIP
switch No. 5 of indoor unit PCB
is set as ON
• Abnormal operation of electric
heater
• Leaving water temperature is
above 72°C
• Thermal fuse is cut off by
abnormal overheating of internal
electric heater
• Mechanical fault at the rmal fuse
• Wire is damaged
• Incorrect connection between
sensor and PCB
• PCB fault
• Sensor fault
• Outdoor temperature is below
-25℃.
• If there is no problem in electric heater
control, possible maximum leaving water
temperature is 62°C.
• This error will not be happened if
temperature of electric heater tank is below
90°C.
• Sensor connection and PCB & sensor fault
should be checked.
• This error will not be happened if outdoor
temperature is above -25℃.
• Resistance: 10k ohm at 25 centigrade
(unplugged)
’
for Remote Room Air sensor
• Resistance: 5k ohm at 25 centigrade
(unplugged)
’
for all sensors EXCEPT Remote Room
Air sensor
• Voltage: 2.5Vdc at 25 centigrade (plugged)
(for all sensors)
• Refer resistance-temperature table to
check in different temperature
• Wire connection between control panel
and indoor unit PCB should be tight
• Output voltage of PCB should be 12Vdc
• Wire connection between control panel
and indoor unit PCB should be tight
• This error can not be permitted
• Flow switch should be closed while internal
water pump is working or DIP switch No. 5
of indoor unit PCB is set as ON
• Flow switch should be open while
internal water pump is not working
Code
Description
Cause
Normal Condition
No.
ENGLISH
Installation Manual
91
Summary of Contents for AHNW096A0
Page 92: ...92 Air to Water Heat Pump ...
Page 93: ......
