Weishaupt WTC-GB 15-B Compact, Installation And Operating Instruction

Page: 132 / 196

Installation and operating instruction
Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact
10 Troubleshooting
83309302 1/2018-05 La
132-196
10.2 Warning codes
The following warnings must only be rectified by qualified personnel:
Warning Cause Rectification
W 1 Humidity in room too high
Check current humidity at room device.
Check parameter
Humidity
at room
device, adjust if required.
W 2 Humidity too low
Check current humidity at room device.
Check parameter
Humidity
at room
device, adjust if required.
W 3 No SD card available
Ensure SD card has been installed correctly.
Insert SD card on the display and operating
unit (system device).
If necessary replace SD card.
The SD card is located at the underside of the
system device.
W 10 Volumetric flow too low
[ch. 3.3.3.2] Ensure there is a flow of water.
Increase water flow.
Purge unit on the water side, initiate program
Automatic purging
, see [ch. 6.6.9.6].
W 11 Emergency-Off
Check components connected to input H1 of
the EM heating circuit.
W 12 Temperature at flow sensor > 95 °C
[ch. 3.3.3]
Temperature is measured at the flow sensor eSTB.
Ensure there is a flow of water.
Increase water flow.
Purge unit on the water side, initiate program
Automatic purging
, see [ch. 6.6.9.6].
Check the heat exchanger on the water side
for contamination or calcification.
W 14 Flow temperature rises too rapidly
(gradient)
[ch. 3.3.3]
Temperature is measured at the flow sensor eSTB.
Ensure there is a flow of water.
Increase water flow.
Purge unit on the water side, initiate program
Automatic purging
, see [ch. 6.6.9.6].
W 15 Difference between flow and flue gas
temperature is too great
[ch. 3.3.3]
The flow temperature is measured at the flow
sensor eSTB.
Ensure there is a flow of water.
Increase water flow.
Check heat demand (e. g. heating curve), re-
duce if necessary.
Heating capacity too high, reduce parameter
2.1.2 Maximum load heating mode
.
W 16 Flue gas temperature too high
[ch. 3.3.3] Check the heat exchanger [ch. 9.1.5].
W 17 Temperature differential between flow
and return to high
[ch. 3.3.3.2]
The flow temperature is measured at the multifunc-
tion sensor VPT.
Ensure there is a flow of water.
Increase water flow.
Check heat demand (e. g. heating curve), re-
duce if necessary.
Heating capacity too high, reduce parameter
2.1.2 Maximum load heating mode
.
W 18 Difference flow (eSTB) and flow tem-
perature(VPT) too great
[ch. 3.3.3.2]
Ensure there is a flow of water.
Increase water flow.
Check the heat exchanger on the water side
for contamination or calcification.
Check
1.2.1.7 Flow temperature
VPT
for plausible value.
W 19 Flow temperature (VPT) rises too rap-
idly (gradient)
[ch. 3.3.3.2]
Temperature is measured at the flow sensor of the
multifunction sensor VPT.
Heat exchanger protection function
Requires no action.