BA_OTE 3+4_Endkunde_EN_V03_20170726.docx Page 44 of 52
16.5 Error table
Code
Malfunc-
Error description Possible cause/ remedy
115
Er 01: Hot water sensor
defect
Replace sensor
116
Er 10: Outside sensor de-
fect
Replace sensor
Er 14: Mixer sensor defect
120
Er 22: Switch-off sensor
TPM or TWR defect
Replace sensor
Er 24: Buffer sensor defect
138
Er 33: High pressure sensor
defect
Check sensor
137
Er 34: Low pressure sensor
defect
Check sensor
5
5 Er 36: High pressure
Insufficient heat distribution, circulation
pump defect, valve closed / air in the
system,
18 18 Er 37: Low pressure
Heat source insufficient, not enough re-
frigerant, expansion valve
Check the refrigerant circuit (OCHSNER)
16 16 Er 38: Hot gas
Expansion valve, insufficient refrigerant,
set value too high
Check the refrigerant circuit (OCHSNER)
10 10
Er 39: Motor protection
compressor
Motor protection relay, Phase er-
ror/overload, heat source temperature
too high
Check the compressor in refrigerant cir-
8 8
Er 42: Frost protection in
heat use system
Insufficient heat distribution, circulation
pump defect, valve closed / air in the
system, check the buffer pump or the