272
COMMISSIONING
ENGLISH
Troubleshooting for Error Code
Display
code
Title
Cause of error
Check point & Normal condition
1
Problem in remote room air sensor
• Incorrect connection between
sensor and PCB(Heater).
• PCB(Heater) fault
• Sensor fault
• Resistance: 10 k
Ω
at 25 centigrade
(unplugged)
→
for Remote room
air sensor
• Resistance: 5 k
Ω
at 25 centigrade
(unplugged)
→
for all sensors
EXCEPT remote room air sensor
• Voltage: 2.5 V DC at 25 centigrade
(plugged) (for all sensors)
• Refer resistance-temperature table
to check in different temperature
2
Problem in refrigerant (inlet side) sensor
6
Problem in refrigerant (outlet side) sensor
8
Problem in water tank sensor
13
Problem in solar pipe sensor
16
Problems in sensors
17
Problem in water-inlet sensor
18
Problem in water-outlet sensor
19
Problem in Electric heater outlet sensor
10
BLDC Water pump Lock
Restriction of BLDC Water pump
• BLDC Water pump defect /
assembly condition abnormal
• Fan lock by foreign material
3
Bad communication between remote
controller and unit.
• Incorrect connection between
sensor and PCB(Heater)
• PCB(Heater) fault
• Sensor fault
• Wire connection between remote
controller and Main PCB
assembly(Heater) should be tight
• Output voltage of PCB should be
12 V DC
5
Bad communication between Main PCB
assembly(Heater) and Main PCB
assembly(Inverter) of the unit.
• The connector for transmission is
disconnected
• The connecting wires are
misconnected
• The communication line is broken
• Main PCB assembly(Inverter) is
abnormal
• Main PCB assembly(Heater) is
abnormal
• Wire connection between remote
control panel and Main PCB
assembly(Heater) should be tight.
53
9
PCB program (EEPROM) fault
• Electrical or mechanical damage a
the EEPROM
• This error can not be permitted
14
Problem in flow switch and flow sensor
Flow switch
• It is open while internal water
pump is working.
• It is closed while internal water
pump is not working.
• It is open while DIP switch No. 5
of Main PCB assembly(Heater) is
set as on.
Flow sensor
• Water Pump ON. : If flow rate is
not more than 7 LPM or not less
than 80 LPM, detect it for 15
seconds.
• Water Pump OFF. : If flow rate is
not less than 7 LPM, detect it for
15 seconds.
Flow switch
• It should be closed while internal
water pump is working or DIP
switch No. 5 of Main PCB
assembly(Heater) is set as on.
• It should be open while internal
water pump is not working.
Flow Sensor
• Display the flow rate value that
received from the indoor unit.
(Range : 7 ~ 80 L/min)
Summary of Contents for THERMA V
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