C Limp Home Mode Messages - Overview; D Troubleshooting - Vaillant recoVAIR VAR 260/4 Installation And Maintenance Instructions Manual

Message
F.812 Failure: Exhaust air
temp. sensor
F.813 Exh. air ventilator un-
der-dimensioned
F.814 Supply air ventilator
under-dimensioned
F.815 Fault: Frost prot. ele-
ment
F.816 Ventilator connection
inverted
Limp home mode messages – Overview
C
Message
Lhm.801 Failure: Exh. air
temp. sensor
Lhm.802 Failure: Exit air
sensor
Lhm.803 Failure: Supply
temp. sensor
Lhm.804 Failure: Outside air
temp. sensor
Lhm.805 Failure: Exhaust air
humidity sensor
Lhm.806 Supply air temp. too
low
Lhm.807 Failure/fault: Air
quality sensor
Lhm.810 No connection to
step switch
Lhm.811 Failure of the supply-
air differential pressure sensor
Lhm.812 Failure of the exit-air
differential pressure sensor
Lhm.815 Supply air target vol.
flow not achieved
Lhm.816 Exit air target vol.
flow not achieved
Lhm.817 Failure: Frost prot.
element
D Troubleshooting
Symptom
Product not operating
Product with increased noise
level
0020159949_07 recoVAIR Installation and maintenance instructions
Possible cause
Exhaust-air temperature sensor
does not work/is defective
Incorrect fan specification
Incorrect fan specification
Exhaust-air humidity sensor
does not work/is defective
Fan connection incorrect/fan
incorrectly connected/installed
Possible cause
Exhaust-air temperature sensor
does not work/is defective
Exit-air temperature sensor
does not work/is defective
Supply-air temperature sensor
does not work/is defective
Outside temperature sensor
does not work/is defective
Exhaust-air humidity sensor
does not work/is defective
Frost protection active
Air quality sensor does not
work/is defective
4-step switch does not work/is
defective
Supply-air differential pressure
sensor does not work/is defect-
ive
Exit-air differential pressure
sensor does not work/is defect-
ive
Incorrect fan specification
Incorrect fan specification
The frost protection element is
defective
Possible cause
The mains voltage has been
interrupted/power cut
Frost protection active (mains
voltage present)
Missing/incorrect silencer in the
supply-air exhaust-air pipes
System components (e.g. heat
exchanger, fan) are defective
Measure
▶
Check that the exhaust-air temperature sensor works correctly.
▶
Check the fan connection, the fan size (up to 260 m
3
360 m /h) and the fan power.
▶
Check the fan connection, the fan size (up to 260 m
3
360 m /h) and the fan power.
▶
Check that the exhaust-air humidity sensor works correctly.
▶
Check the fan connections.
Measure
▶
Check that the exhaust-air temperature sensor works correctly.
▶
Check that the exit-air temperature sensor works correctly.
▶
Check that the supply-air temperature sensor works correctly.
▶
Check that the outside temperature sensor works correctly.
▶
Check that the exhaust-air humidity sensor works correctly.
▶
Wait until the supply-air temperature increases again. The
product then starts normal operation.
Supply air temp.: > 10 ℃
▶
Check the air quality sensors.
1. Activate the 4-step switch in the installer level.
2. Check that the 4-step switch works correctly.
▶
Check that the supply-air differential pressure sensor works
correctly.
▶
Check that the exit-air differential pressure sensor works cor-
rectly.
▶
Check the fan connection, the fan size (up to 260 m
3
360 m /h) and the fan power.
▶
Check the fan connection, the fan size (up to 260 m
3
360 m /h) and the fan power.
▶
Replace the frost protection element.
Measure
▶
Wait until the mains voltage has been re-established and the
product automatically switches on (all settings are retained).
1. Check whether S.815 is displayed in the Live Monitor.
2. Wait until the outside temperature increases (the product
automatically switches on no later than 60 minutes after the
temperature increases.).
– Outside temperature: > −3 ℃
▶
Install silencers in accordance with the system planning.
▶
Replace defective system components.
Appendix
3
/h or
3
/h or
3
/h or
3
/h or
21