Room Temp. Sensor Hc1 - Viessmann VITOTRONIC 200 Service Instructions Manual

Troubleshooting
Message overview

78 Room temp. sensor HC1

No frost protection mode via room temperature sen-
■
sor
■ No room temperature hook-up
■ No room temperature-dependent control
Cause
Lead break, room temperature sensor, heating circuit
without mixer A1/HC1
79 Room temp. sensor HC2
■ No frost protection mode via room temperature sen-
sor
■ No room temperature hook-up
■ No room temperature-dependent control
Cause
Lead break, room temperature sensor, heating circuit
with mixer M2/HC2
7A Room temp. sensor HC3
■ No frost protection mode via room temperature sen-
sor
No room temperature hook-up
■
No room temperature-dependent control
■
Cause
Lead break, room temperature sensor, heating circuit
with mixer M3/HC3
7B Room temp. sensor SKK
No cooling mode
Cause
Lead break, room temperature sensor, cooling circuit
90 Solar module sensor 7
No switching of the appliance connected at plug
the solar control module, type SM1 (circulation pump
or 3-way diverter valve)
Cause
Short circuit, temperature sensor
module, type SM1
88
(cont.)
sS
at solar control
/
Measure
Check remote control. Replace remote control if re-
quired: See "Vitotrol" installation and service instruc-
tions.
Measure
Check remote control. Replace remote control if re-
quired: See "Vitotrol" installation and service instruc-
tions.
Measure
Check remote control. Replace remote control if re-
quired: See "Vitotrol" installation and service instruc-
tions.
Measure
Check resistance value (NTC 10 k
"Controller and sensor PCB") or on remote control unit.
of
Action
Check sensor on solar control module, type SM1:
/
See installation and service instructions for solar control
module, type SM1.
) at plug F16 (see
Ω