
WITURATECHNOLOGYSDNBHD|WT‐1672CGSMRemoteControlSwitchUserManualV1.8 13
Troubleshooting
1. RedpowerLEDnotalight
Ensure that your DC power supply is connected
correctly,positive(+)toterminal220vandnegative(‐)
to terminal N. Verify 12 volts is present using a volt
meter
2. BluenetworkLEDflashingeveryonesecond
andnotevery3seconds
Ensure your SIM cardhasbeenactivatedand thatthe
PIN request has been disabled. If the unit is in a low
signal strength area consider using an external GSM
antennaorchangingtoanothernetworkprovider
3. Iamnotreceivingconfirmationtestmessages
whenprogramtheadministratorsnumber
EnsureyourtelephonenumberisintheAdministrator
list and that sendingtextmessages to your number is
enabled.
4. Iamnotreceivinganytextmessageswhen
initiallyprogrammingtheunit
Ensure the unit is connected to the GSM network by
observing the blue network LED; it should be flashing
once every 3 seconds (see 2 above). Ensure the SIM
cardhascredit
5. Theunithasbeenworkingforseveralmonths
andhasnowstoppedrespondingtocallsand
textcommands
MostbutnotallPAYSIMcardswillbede‐activatedby
thenetworkifnotusedtomakeanoutgoingvoicecall
orsendanSMStext messagewithin aspecific
period.
To prevent this simply send a txt command *0*PW#,
then*2*, it will reply by textmessage, do thisonce a
monthtokeeptheSIMcardactive
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