Fault Codes - Daikin Altherma EHSX04P50D Installations- Und Wartungsanleitung

Malfunction
Internal circulation Air in the water circuit.
pump generates ex-
cessively high operat-
Noises caused by vibrations.
ing noises
Bearing damage in the internal circulation pump
Water pressure at pump inlet too low.
Safety pressure relief Expansion tank is defective.
valve is leaking or al-
Water pressure in heating system is too high.
ways open.
Safety pressure relief valve is stuck.
Tab. 8-1 Possible malfunctions
8.3

Fault codes

Code Component/Designation
E75 Inflow temperature sensor
t
V, BH
E76 Storage tank temperature
sensor t
DHW1
E81 RoCon BM2C printed circuit
board
E88 RoCon BM2C printed circuit
board
E91 Connected CAN modules
E128 Return flow temperature
sensor t
R1
E129 Pressure sensor DS
Daikin Altherma EHS(X/H)
Daikin Altherma integrated solar unit
008.1444099_00 – 07/2018 – EN
Possible cause
Error
Inflow temperature sensor fault
Storage tank temperature sensor fault
Communication fault
Return flow temperature sensor fault
Pressure sensor fault
8 Faults and malfunctions
Possible solution
▪ Completely vent the heating system and the internal circula-
tion pump.
▪ Check the Daikin Altherma EHS(X/H), its components and
covers to ensure they are fastened correctly.
▪ Replace the internal circulation pump.
▪ On the controller [→ Main menu → Info → Overview], check
that sufficient water pressure (> 0.5 bar) is available.
▪ Check that the pressure gauge is working correctly (connec-
tion of an external pressure gauge).
▪ Check the admission pressure in the expansion tank and wa-
ter pressure; if necessary, top up the heating water and adjust
the admission pressure.
▪ Replace the expansion tank.
▪ On the controller [→ Main menu → Info → Overview], check
that the water pressure is below the specified maximum pres-
sure. If necessary, drain sufficient water until the pressure is
in the middle of the permissible range.
▪ Check the safety pressure relief valve and if necessary, re-
place it.
▪ Turn the red knob on the safety pressure relief valve anti-
clockwise. If you can hear a rattling noise, the safety pres-
sure relief valve needs replacing.
Possible fault rectification
Inflow temperature sensor defective.
▪ Check, replace.
Storage tank temperature sensor t
cable defective or not connected.
▪ Check, replace.
▪ Check the [Hot water sensor] setting.
Parameter storage in the EEPROM corrupted.
▪ Contact a service technician.
Parameter storage in the external flash memory cor-
rupted.
▪ Contact a service technician.
CAN module bus ID duplicated, set unique data bus
address.
Return flow temperature sensor t
sensor connecting cable defective.
▪ Check, replace.
Pressure sensor DS defective.
▪ Check, replace.
Installation and maintenance instructions
or connecting
DHW1
in FLS flow
R1
43