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FTC4 Installation Manual
28
Error Codes
Error Codes
L3
Circulation water temperature overheat protection
Flow rate may be reduced check for:
• Water leakage
• Blocked strainer
• Water circulation pump function
L4
DHW tank water temperature overheat protection
Check immersion heater and its
contactor
L5
Indoor unit temperature thermistor failure *
1
Check resistance across thermistor
L6
Circulation water freeze protection
See action for L3
L8
Heating operation error
Re-attach any thermistors that have
become dislodged
L9
Low primary circuit flow rate detected by flow switch *
1
See action for L3, check DIP switches,
replace flow switch
LC
Boiler circulation water temperature overheat protection
Check that target temperature of boiler
exceeds the restriction (See manual for
thermistors PAC-TH011HT-E)
See action for L3
LD
Boiler temperature thermistor failure *
1
Check resistance across thermistor
LE
Boiler operation error
See action for L8. Check status of
the boiler
LH
Boiler circulation water freeze protection
See action for L3
LL
Settings errors of DIP switches on FTC4 control board
For boiler operation check that DIP
SW1-1 is set to ON and DIP SW2-6 is set
to ON. For 2 zone control, check that DIP
SW2-6 and SW 2-7 are set to ON.
J0
Communication failure between FTC4 and wireless receiver
Check connection cable for damage
or loose connections
P1
Room temperature thermistor failure *
1
Check resistance across thermistor
P2
Refrigerant temperature thermistor failure *
1
Check resistance across thermistor
P6
Antifreeze protection of plate heat exchanger
See action for L3
J1-J8 Communication failure between wireless receiver and
Check remote controller battery, check
wireless remote controller
pairing between remote controller and
receiver, test the wireless connection
J9
Communication failure between main controller and
Check connection cable for damage or
FTC4 slave board
loose connections
E0–E5 Communication failure between main controller and
Check connection cable for damage or
FTC4 master board
loose connections
E6–EF Communication failure between FTC4 and outdoor unit
Check outdoor unit is not turned off,
check connection cable for damage or
loose connections, refer to outdoor
unit service manual
E9
Outdoor unit receives no signal from outdoor unit
Check both units are switched on,
Check connection cables for damage
or loose connections, refer to outdoor
unit service manual
U*, F* Outdoor unit error
Refer to outdoor unit service manual
Code
Action
Error
Summary of Contents for Ecodan HUS210FTC4ST
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Page 8: ...5 Pipework Configuration 8 FTC4 Installation Manual ...
Page 20: ...20 FTC4 Installation Manual 14 Ecodan Only System Schematic ...
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