27
9 Single compressor with reverse defros-
ting and external HS 2 (BGC or oil fired
boiler).
A Dual compressor of identical size with
reverse defrosting and external HS 2
(BGC or boiler).
B Dual compressor of different sizes with
reverse defrosting and external HS 2
(BGC or boiler).
50
ANALYSIS
Function to check the system state during
initialisation or during operation. At the top
of the display, figures from 1 to 6 indicate the
number of connected heat pumps.
An MSM is connected, if the display shows 7.
The bottom of the display shows the enabled
stages. However, this does not mean that
these are operating. For this, the idle times of
the individual heat pumps must first reach 0.
The two-digit display shows the internal con-
troller calculation. A stage will be switched
every time the counter has counted down to
zero. This calculation depends on the control
response time and the control deviation, see
parameter 40.
51
DIAGNOSTIC
Pressing PRG displays the connected BUS
users in sequence.
52
RESET HP
You can reset the heat pump in case of faults.
Pressing PRG and after setting the system to
ON, followed by repeated pressing of PRG
resets that fault. The compressor starts again
after the idle time has expired. The fault re-
mains in the error list.
53
RUN TIMES
Pressing PRG displays in sequence the running
times of the individual compressors, HS 2 and
the solar heating pump in hours. Run times
can only be reset via a hardware reset.
5.7 Troubleshooting
Faults/errors in the system or in the heat
pump are indicated on the display. All para-
meters required for extensive system analysis
can be checked under the system parame-
ters „Commissioning“ and „Info Temp.“. For
troubleshooting, analyse all available WPM
parameters before opening the heat pump
(to gain access to the IWS).
Fault display: Heat pump-specic or hard-
ware fault
Fault message (flashing)
HP/LP FAULT
All faults (except hot gas) causes the heat
pump to shut down, the red LED flashes for
approx. 10 minutes on the IWS, the idle time
is displayed and the corresponding fault is
written to the error list.
The heat pump restarts after the fault and the
idle times have expired. The heat pump will
only restart after expiry of the idle time, even
if a heat pump reset has been implemented
or if the red LED on the IWS no longer
flashes.
Fault inputs on the IWS have no effect on
HP type 2 and 3. In standard operation this
means, that 230 V is always present at the
fault inputs.
The hot gas fault for HP type 2 and 3 is pu-
rely a limiter shutdown, i.e. there will not be a
fault shutdown, the red LED on the IWS will
not flash, and no fault will be written to the
error list. Only the idle time will be activated.
One special feature of HP type 2 and 3 faults
is „Other faults“. This scans the input during
operation and when the heat pump has stop-
ped.
After the heat pump has been switched OFF
(controlled shutdown), and after the expiry of
10 s, the 230 V signal must be present. If that
is not the case, the red LED on the IWS will
flash, and „Other fault“ will be displayed.
Such faults are written to the error
list, and the system will be switched
OFF. The display message will extinguish 10
min after the fault has been removed. The
system will be shut down permanently, if
5 heat pump-specic or hardware faults
occur within two hours. Under these cir-
cumstances, you can only restart the heat
pump after the fault has been removed
and the IWS has been reset.
Example: The high pressure or low pressure li-
miter has responded on the 17.07.03 at 14:50
h representing the latest fault in heat pump 1.
47
Software WPM
Display of the latest software version.
48
Software IWS
Pressing PRG displays the software version of
the individual heat pumps.
49
Type IWS
Pressing PRG enables you to call up the fac-
tory settings of the heat pumps which will be
shown on the display.
HP type 1
Rotary switch position IWS:
1 Single compressor with hot gas defros-
ting
2 Dual compressor of identical size with
hot gas defrosting
3 Dual compressor of different sizes with
hot gas defrosting
9 Single compressor with reverse defros-
ting
A Dual compressor of identical size with
reverse defrosting
B Dual compressor of different size with
reverse defrosting
HP type 2
Slide switches (WP-Typ) position IWS:
1 Single compressor with reverse defros-
ting and internal HS 2 (DHC insert).
2 Dual compressor of identical size with
reverse defrosting and internal HS 2
(DHC insert).
3 Dual compressor of different sizes with
reverse defrosting and integral HS 2
(DHC insert).
HP type 3
Slide switches (WP-Typ) position IWS:
HP/LP FAULT
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