Fault Codes - Daikin Altherma 3 H HT ECH2 O Referenzhandbuch Für Den Monteur

7.3

Fault codes

Error Code Component/Designation Error
number
75 Inflow temperature sensor
t
V, BH
76 Storage tank temperature
sensor t
DHW1
81 Circuit board RoCon
BM2C
88 Circuit board RoCon
BM2C
91 Connected CAN modules
128 Return flow temperature
sensor t
R1
129 Pressure sensor DS
198 FLS flow sensor,
3-way mixer valve 3UVB1
200 Electrical components
8005 Pressure sensor DS
8006 Pressure sensor DS
Daikin Altherma ETS(X/H)(B)-D
Heat pump (indoor unit) with integrated heat accumulator
008.1447299_00 – 06/2019 – EN
Possible error rectification
Flow temperature sensor Inflow temperature sensor defective.
error
▪ Check, replace.
Storage tank temperature Storage tank temperature sensor t
sensor error ive or not connected.
▪ Check, replace.
▪ Check the [Hot water sensor] setting.
Communication fault Parameter storage in the EEPROM corrupted.
▪ Contact service partner.
Parameter storage in the external flash memory corrupted.
▪ Contact service partner.
CAN module bus ID duplicated, set unique data bus address.
Return flow temperature Return flow temperature sensor t
sensor error cable defective.
▪ Check, replace.
Pressure sensor error Pressure sensor DS defective.
▪ Check, replace.
Flow measurement not Error occurs when 3UVB1 3-way mixer valve is in the bypass posi-
plausible tion, the internal circulation pump is running but too low a volumet-
ric flow is measured.
Required minimum water flow rate:
See
▪ Air in heating system.
▪ Vent.
▪ Internal circulation pump is not running.
▪ Check electrical connection and controller settings. If the cir-
▪ FLS flow sensor dirty, clogged.
▪ Check, clean.
▪ FLS flow sensor defective.
▪ 3UVB1 3-way mixer valve drive defective.
▪ Check, replace.
Communication fault Communication between RoCon BM2C and printed circuit board
A1P is disturbed.
▪ Wiring or connections, poor contact.
▪ Check, replace
Water pressure in heating Water pressure has fallen below permissible minimum value.
system too low
▪ Insufficient water in the heating system.
▪ Check the heating system for leaks, top up water.
▪ Pressure sensor DS defective.
▪ Check, replace.
Pressure drop in heating Pressure drop too fast.
system too high
▪ Insufficient water in the heating system.
▪ Check the heating system for leaks, top up water.
▪ Pressure sensor DS defective.
▪ Check, replace.
7 Faults and malfunctions
DHW1
in FLS flow sensor connecting
R1
Chap. 5.4
culation pump is defective, replace it.
or connecting cable defect-
Installer reference guide
39