Viessmann Vitoclima 300-S Service Instructions For Contractors page 33

Diagnosis
(cont.)
odU External
tr
oPr Operating mode
unit
oFn Fan
HP Four-way reversing valve
SPd Speed
oAt Outside temperature
HSt Processor temperature
oCt Temperature at the heat ex-
changer of the external unit
Ctt Compressor temperature
rgA Suction gas temperature cir-
cuit A
rgb Suction gas temperature cir-
cuit B
rgC Suction gas temperature cir-
cuit C
rgd Suction gas temperature cir-
cuit D
SCt Wet steam temperature
EEA Electronic expansion valve A
EEb Electronic expansion valve B
EEC Electronic expansion valve C
EEd Electronic expansion valve D
Pr Power supply
CUr Current (A) at the compressor
Timer CoP Compressor time
Troubleshooting
33