Nokia flexi bts alarms

Alarms In NOKIA FLEXI BTS BY : Preetam Kumar Jangid

1.)

7401 Alarm

Syntex Type Severity Colour Pin Root

Mains Failure N/C Major Green & Green/White 7, 25 PIU

Root cause Cause

Verification

2.)

DDF

BTS

Alarm occurs when there is no AC power supply on site 1. AC gets failure due to regular AC cut. 2. AC gets failure due to any s/c. 3. AC gets failure due to any o/c.  To check the alarm Switch off the mains MCB from PIU.  To remove alarm turn on the mains mcb.

7402 Alarm

Syntex Type Severity Colour Pin Root

Rectifier Fail N/O Minor Blue & Blue /White 8, 26 Alarm panel Of P.P.

DDF

BTS

Root cause Cause

Verification

3.)

7403 Alarm

Syntex Type Severity Colour Pin Root Root cause Cause

Verification

4.)

Alarm occurs when any one of the SMPS gets failure. 1. Any SMPS gets failure. 2. Due to failure of MCB. 3. Due to any s/c.  To check the alarm firstly remove the rectifier from the SMPS or switch off the MCB of rectifier from SMPS.  To remove alarm switch on the.MCB of the rectifier moduleor insert the new rectifier module.

Low Battery Voltage N/O Criticle Violet & Violet /White 9, 27 Alarm panel Of P.P.

BTS

Alarm occurs when Battery voltage reaches 46V/47V. 1. When AC gets failure and D.G. is not working & site on battery from last 3-4 hrs. 2. When Battery is not fully charged and load on battery.  To check the alarm set the o/p load vtg of battery less then 48V & switch off the MCB & D.G..  To remove alarm switch on the.MCB (mains) or switch on the D.G. if AC is not available.

7404 Alarm

Syntex

DDF

Site On Battery

Type Severity Colour Pin Root Root cause Cause

Verification

5.)

N/O Major Gray & Gray /White 10, 28 Alarm panel Of P.P.

DDF

BTS

Alarm occurs when all SMPS & Rectifiers gets failure. 1. When AC gets failure and D.G. does not start. 2. AC gets fail DG is off. 3. DG is not working properly. 4. AC gets failure & DG is not available at site. 5. All SMPS & rectifires gets failure.  To check the alarm switch off the mains MCB from PIU & switch off DG also.  To remove alarm switch on the mains MCB or DG (if mains is not available).

7405 Alarm

Syntex Type Severity Colour Pin Root

Site On DG N/O Minor Pink & Pink /White 11, 29

Root cause Cause

Alarm occurs when load of site on DG. 1. When AC gets failure due to cutting time. 2. AC gets fail due to s/c. 3. MCB gets failure.

PIU

DDF

BTS

Verification

6.)

 To check the alarm switch off the mains MCB from PIU & switch on the DG (if it is not in auto mode).  To remove alarm switch on the mains MCB (if mains is available).

7406 Alarm

Syntex Type Severity Colour Pin Root

DG LLOP N/O Criticle Light Green & Black /Green 12, 30

Root cause

Alarm occurs when lube oil pressure gets below then specified level. 1. Due to leakage of lubricant. 2. Due to overflow of lubricant. 3. Due to no service on time. 4. Due to no oil change on the time.  To check the alarm switch off the mains MCB from PIU & switch off the DG also.  To remove alarm maintain the lubricant oil pressure till specified level.

Cause

Verification

7.)

LLOP Sensor

PIU

7407 Alarm

Syntex Type Severity Colour

Low Fuel Level N/O Minor Light Blue & Black /Blue

DDF

BTS

Pin Root

13, 31

Root cause

Alarm occurs when fuel level goes below then 40% of the capacity. 1. When site on DG from long time. 2. When fuel tank is not fully filled. 3. Tank have leakage.  To check the alarm see if the desired fuel level of DG is set on 40% or not.  To remove alarm fill the tank of DG.

Fuel Sensor

Cause

Verification

8.)

PIU

DDF

BTS

7408 Alarm

Syntex Type Severity Colour Pin Root

DG Fails To Start N/O Major White & Black /White 13, 31

Root cause

Alarm occurs when PIU is not able to start DG in 3 attempts. 1. Due to problem in self. 2. Self battery is not charge. 3. No fuel in DG. 4. No connection b/w PIU & Self.  To check the alarm switch off the mains mcb from PIU and check dg set is not in auto mode or remove the connection b/w PIU and Self.  To remove alarm start DG in manual mode.

Cause

Verification

PIU

DDF

BTS

9.)

7409 Alarm

Syntex Type Severity Colour Pin Root Root cause Cause

Verification

10.)

AC Failure N/O Major Light Gray & Black /light gray 15, 33 µC

DDF

BTS

Alarm occurs when both AC gets failure. 1. Due to problem in µC. 2. Site on battery. 3. Level of gas in AC goes below then the specified level. 4. Switching problem.  To check the alarm switch off the AC’s.  To remove alarm switch on/repair/replace AC’s.

7410 Alarm

Syntex Type Severity Colour Pin Root

Door Open N/C Minor/Major/Criticle (Accd. to condition) Red/ Black & Red/Blue 16, 34 Door Sensor

Root cause Cause

PIU

DDF

BTS

Alarm occurs when Door is open. 1. Unauthorisd person is in the shelter. 2. Work on progress inside the shelter. 3. Someone (may be technician, engineer or guard) forget to close the door. 4. Sealing of door is not proper.

Verification

11.)

5. Lock of door is not correct.  To check the alarm open the door.  To remove alarm close and seal proper the door.

7411 Alarm

Syntex Type Severity Colour Pin Root

High Room Temp. N/O Major Orange/Red & orange/Light gray 16, 34

Root cause Cause

Alarm occurs when Temp reaches 35° c. 1. AC is not working. 2. Door of shelter is open. 3. Site on battery.  To check the alarm rub thermister in b/w hands .  To remove alarm switch on the AC & set AC temp on desired value.

Verification

12.)

Temp.Sensor

µc of AC

DDF

BTS

7412 Alarm

Syntex Type Severity Colour Pin Root

Fire & Smoke. N/O Criticle Orange/Black & Orange/Green 18, 36 F& S sensor

PIU

DDF

BTS

Root cause Cause Verification

Alarm occurs when Fire & Smoke at site. 1. Fire & Smoke at site. 2. Due to any inflammable object at site.  To check the alarm create a small fire by paper or jute.  To remove alarm Reset smoke & fire sensor and clean the smoke from the sensor.