Solar working station operation manual SR881
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4.12 Temperature check
Under standby status,
►Press “+”“-” button can check the value of temperature sensors T0~ T4, pump speed
(
ｎ％
), accumulative operation time of circuit pump (Hp), daily thermal energy (DKWH),
accumulative thermal energy (KWH) or (MWH), Flow rate
（
L/M
）
.
When checking temperature, T0
– T4 will displays one by one, corresponding sensor
signal blinks.
►Press “ESC” button, week and tank temperature can be displayed.
Note:
1. Value of accumulative operation time of circuit pump (Hp), daily thermal energy (DKWH)
and accumulative thermal energy (KWH) or (MWH) can only be checked after triggering of
QHQM thermal energy balance function.
2. Flow rate
（
L/M
）
can be displayed when digital flow counter is used in solar system. If
mechanical flow counter is used, then flow rate can’t display.
5. Protection function
5.1. Memory protection
In case power failure occurs, controller keeps the parameter settings unchanged.
5.2 Screen protection
When no any press on button for 3 minutes, screen protection is activated automatically,
and then LCD lighting lamp is switched-off. Through press any button to light LCD lamp
again.
5.3 pump idling protection
Pump station monitors that no flow is in the circuit pipe within 3 minutes, then system pump
is ceased, "P1" blinks on the screen, through this function, pump is prevented from
damaging caused by pump idling.
：
reasons for no flow :
leakage problem in the system circuit pipe.
block occuring on the blade of digital flow counter
Switch-off the power supplier of controller to exit circuit pump protection function, recovery
P1to standby status.
