35
Event
B
Causes
"Timer expired"
Active timer has expired, e.g.
"Heat pump blocking time"
: See chapter "Tim-
er".
"Max. value exceeded"
Max. hot gas temperature or max. high pressure condenser exceeded.
"Output demand"
Production manager has issued a demand to the heat pump.
"Max. temperature in secon-
dary circuit exceeded"
Max. flow temperature in secondary circuit exceeded
"Limit pressure"
Min. suction gas pressure undershot.
"Temperature rise"
Max. temperature differential between evaporator and condenser exceeded or
min. temperature differential between evaporator and condenser undershot.
State machines "SM"
F
State machines indicate the status of control circuits in
the heat pump control unit. This enables the tracing of
functions of individual heat pump and heating system
components.
Central demand managers
Display
Control circuit
"CFDM2"
Heating circuits (
"Central demand manager HC"
)
Production manager
Display
Control circuit
"PM2"
Heating circuits (
"Production manager HC"
)
Heat sources
Display
Control circuit
"HP1"
Heat pump
"BRINE CIRC"
Primary circuit (
"Geothermal probe"
)
Hydraulic circuit "SC"
G
Display
Hydraulic circuit
"HK"
Secondary circuit
Heat pump
Compressor runtime
1. Service menu:
Press and hold
OK
+
å
simultaneously for
approx. 4 s.
2. "Diagnosis"
3. "Heat pump"
4. "Runtime compressor"
for single-stage heat
pump
5.
Compressor hours run (
"Runtime"
) can be scan-
ned with for every
"Load class"
.
Select with
230h
Runtime compressor
Ü
1
Load class
3
4
5
h
(
Runtime
?
Fig. 14
Diagnosis
System
(cont.)
5800 917 GB
Diagnosis
