Indicator Lights (Leds) - Grundfos G 401 Installation And Operating Instructions Manual

5. Indicator lights (LEDs)

Fig. 1 Indicator lights
LED
On System fault
F
Off No fault
On In operation
R
Off Out of operation
On Supply connected
P
Off Supply not connected
Capacity of internal back-up battery
On
OK
B
Capacity of internal back-up battery
Off
too small for GSM transmission
On G 400 connected to GSM operator
S
G 400 not connected to GSM
Off
operator
On Modem sending
Tx
Off No modem activity
On Modem receiving
Rx
Off No modem activity
On GSM modem activity
W
Off No GSM modem activity
On SMS received
M
Off No SMS
On Ethernet link OK
Tx
Off No Ethernet connection
On Ethernet activity
Rx
Off No Ethernet activity
On Communicates with the CU 401
C
Off No communication with the CU 401
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