63
Drain the heat pump at the on-site drain valve on the
primary/secondary side.
Checking the sensors
For the position of the sensors in the heat pump: See
Fig. 39 on page 62.
Connect the sensors: See separate "Connection and
wiring diagram".
Temperature sensors type Pt1000
Sensor
Test element
■
Outside temperature sensor
■
Secondary circuit flow temperature sensor
■
Secondary circuit return temperature sensor
■
Cooling circuit flow temperature sensor
■
Buffer temperature sensor
■
Cylinder temperature sensor
■
Immersion temperature sensor
Pt1000
1600
1500
1400
1300
1200
1100
1000
900
800
Resistance
in Ω
Temperature in °C
-50
0
50
100
150
Fig. 40
!
Please note
Measuring device may be damaged.
All sensors can be checked via the temperature
displays in the program. If a sensor still needs to
be tested directly, one of the 2 sensor connec-
tions must be separated from the control. Other-
wise the measuring device will indicate false val-
ues or can sustain damage.
Checking fuses
Fuses in the wiring chamber
■
Power circuit fuse, compressor (see separate "Con-
nection and wiring diagram")
Subject to heat pump/compressor output; see chap-
ter "Specification"
■
Power circuit fuse, system components (see sepa-
rate "Connection and wiring diagram")
1.
Switch OFF the power supply.
2.
Opening the wiring chamber.
3.
Check fuses. Replace if necessary.
Danger
Incorrect or improperly fitted fuses can lead
to an increased risk of fire.
■
Insert fuses without using any force. Posi-
tion fuses correctly.
■
Only use structurally identical types with
the same response characteristics.
Repairs
Draining the heat pump on the primary/secondary side
5855865
Maintenance
Summary of Contents for BW 352.B027
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