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Table of error messages which can be displayed
No. Designation of error
Location
Reset
HP oper.
Manual
Automatic
0: No fault
10: Outdoor sensor
BX4 (X84)
No
No
Yes
30: Flow sensor 1
BX1 (X80)
No
No
Yes
31: Cooling fl ow sensor 1
BX1 (X80)
No
No
Yes
32: Flow sensor 2
BX31 (X153)
No
No
Yes
33: Heat pump fl ow temp sensor error
BX1 (X80)
No
No
Yes
44: Heat pump return temp sensor error
BX2 (X80)
No
No
per diagram
50: DHW temp sensor 1
BX3 (X84)
No
No
Yes
60: Room sensor 1
No
No
Yes
65: Room sensor 2
No
No
Yes
76: Special sensor 1
Bx
No
No
Yes
83: BSB wire short-circuit
No
No
Yes
84: BSB, address collision
No
No
Yes
85: Radio communication error
No
No
Yes
98: Extension module 1
No
No
Yes
99: Extension module 2
No
No
Yes
100: 2 master clocks on bus
No
No
Yes
102: Clock without running supply
No
No
Yes
105: Maintenance message
No
No
Yes
121: HC1 fl ow temp too low
No
No
Yes
122: HC2 fl ow temp too low
No
No
Yes
126: DHW charge monitoring
No
No
Yes
127: Anti-legionella temperature
No
No
Yes
134: Heat pump alarm summary
E20
Yes
Number *
No
138: No heat pump control sensor
No
Yes
No
146: Sensor / control device confi guration
No
No
Yes
171: Alarm contact 1 activated
H1/H31
No
No
Yes
172: Alarm contact 2 activated
H21/H22/H32
No
No
Yes
174:Alarm contact 4 active H3
No
No
Yes
178: HC1 safety thermostat
No
No
Yes
179: HC2 safety thermostat
No
No
Yes
201: Frost alarm
BX1 (X80)
Yes
No
No
243: Swimming pool sensor
BX34 (X154)
No
No
Yes
325: BX/ext unit: same sensors
No
No
Yes
327: Ext modules: same functions
No
No
Yes
329: Ext modules/mixing grp: same functions
No
No
Yes
330: BX1 no function
No
No
Yes
331: BX2 no function
No
No
Yes
332: BX3 no function
No
No
Yes
333: BX4 no function
No
No
Yes
334: BX5 no function
No
No
Yes
335: BX21 no function
No
No
Yes
336: BX22 no function
No
No
Yes
357: cooling circuit fl ow temp not reached
No
No
Yes
359: no cooling valve Y21
No
No
Yes
360: no process reversing valve Y22
No
No
Yes
364: Heat pump cooling system error
No
No
Yes
369: External fault
No
370: Outdoor unit fault
No
Number* If such statuses or events occur for the fi rst time, they will not directly generate a fault message, but only a status message.
Only if the anomaly occurs repeatedly over a predefi ned time period and at a given frequency (number) will an error message be generated.
Waterstage / Maintenance Manual / 2105 - EN
