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Installation and operating instruction
Hydraulic unit WWP LS 8 ... 16-B
10 Troubleshooting
83306902 2/2017-05 La
80-88
The following faults must only be rectified by qualified personnel:
Warning
Cause
Rectification
23
Power consumption of compressor motor too high
Normally no action is required. Troubleshooting
is only required, if the problem occurs several
times within one hour.
Check cooling circuit
24
Fan does not run
Check fan, if necessary replace
26
Compressor blocked
Check fan, if necessary replace
28
Impermissible operating condition
Briefly isolate the outdoor unit from voltage
supply
If the fault persists despite restart, check cir-
cuit board in outdoor unit and replace if ne-
cessary
29
Internal cooling sensor (B8) or heat exchanger pres-
sure sensor (B12) defective
Check the sensor and cable and replace if ne-
cessary
30
Condenser overheats
Normally no action is required. Troubleshooting
is only required, if the problem occurs several
times within one hour.
Check cooling circuit
31
Application limit exceeded
–
40
Insufficient flow
Minimum volumetric flow:
WWP LS 8: 0.8 m³/h
WWP LS 10: 1.0 m³/h
WWP LS 13: 1.2 m³/h
WWP LS 16: 1.3 m³/h
Check shut off device
Check thermostatic valves of heating circuit
Check flow sensor, if necessary replace
41
Flow/return spread of heating circuit to great
Increase volumetric flow
Increase pump capacity
42
Pressure at internal heat exchanger pressure
sensor (B12) to high.
Check the refrigerant level.
Check actuator of expansion vessel, replace if
necessary
47
No voltage supply to outdoor unit / blocked by en-
ergy generator
Wait for release by energy generator
Check voltage supply
50 / 51
External sensor (B1) defective
Check the sensor and cable and replace if ne-
cessary
52 / 53
De-couple sensor (B2) defective
54 / 55
DHW sensor (B3) defective
56 / 57
Flow sensor (B10) defective
Check cable, if necessary replace sensor
58 / 59
Flow sensor electric heating (B7) defective
Check the sensor and cable and replace if ne-
cessary
60 / 61
Internal refrigerant sensor (B8) defective
62 / 63
Return sensor EWT (B9) defective
64 / 65
Flow sensor (B10) defective
Check cable, if necessary replace sensor
66 / 67
Internal heat exchanger pressure sensor (B12) de-
fective
68
Flow sensor (B10) signal fault
Check cable, if necessary replace sensor
98 / 99
Internal fault
–