Time / start counter
Line no.
Operating line
8450
Hours run compressor 1
8451
Start counter compressor 1
8452
Hours run compressor 2
8453
Start counter compressor 2
These operating lines show the total number of operating hours and the number of
starts of compressor 1 and 2 since they were first commissioned.
Line no.
Operating line
8454
Locking time HP
This operating line shows the total number of heat pump locking hours enforced by the
electric utility (via E6) since the time the heat pump was first commissioned.
Line no.
Operating line
8455
Counter number of locks HP
This operating line shows the total number of heat pump locking actions enforced by
the electric utility (via E6) since the heat pump was first commissioned.
Line no.
Operating line
8456
Hours run el flow
8457
Start counter el flow
The total number of operating hours and the number of starts of the electric immersion
heater in the flow can be read off here.
Heat pump air
Line no.
Operating line
8469
Fan speed
8470
Fan
8471
Process reversing valve
8475
Evaporator temp
8477
Temp diff defrost act value
8478
Temp diff defrost setpoint
8480
Remain time defrost lock
8481
Remain time forced defrost
8485
Number defrost attempts
This shows the current operating state of the fan for the air-to-water heat pump K19 (off
/ on).
Fan K19
This shows the current state of the process reversing valve (on = process reversed, off
= process runs normally).
Process revers valve Y22
This shows the current evaporator temperature at sensor B84.
Evaporator temp
Shows the present temperature differential between source
inlet (B91) and evaporator temperature (B84).
Temp diff defrost act value
This shows the setpoint of the temperature difference between source inlet (B91) and
evaporator temperature (B84) to be reached to enable the evaporator to become
completely defrosted (
ǻ
T defrosted).
Temp diff defrost setpoint
Remain time defrost lock
This shows – after a successful or unsuccessful defrost process – how long the defrost
function is locked until a new defrost attempt may be made / new defrost process may
be carried out.
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Siemens Switzerland Ltd
User manual RVS61.843, RVS41.813
CE1U2355en_02
HVAC Products
6 The settings in detail
28. September 2009