while loop is not working in sql server 2012

Question

DECLARE @lnCnt INT,

@inc INT=1,

@rcptcnt INT,

@rcptinc INT=1,

@Lnno VARCHAR(25)='',

@RcptNo VARCHAR(30)='',

@CllnAmt NUMERIC(18, 2)= 0,

@Effdt DATETIME='1900-01-01',

@InstAmt NUMERIC(18, 2),

@balance NUMERIC(18, 2)=0,

@InstlmtDueDt DATETIME,

@process CHAR(1)

SELECT @rcptcnt = Count(LnRcptNo)

FROM #Instcoll

WHERE Isnull(process, '') <> 'Y'

WHILE @rcptinc <= @rcptcnt

BEGIN

SELECT @balance = TranTypeAmt FROM #Instcoll WHERE pk_id = @inc AND process <> 'Y'

IF @balance > 0

SELECT @Effdt = Min(effdt) FROM #Instcoll WHERE Isnull(process, '') <> 'Y'

SELECT @CllnAmt = TranTypeAmt,@RcptNo = LnRcptNo,@lnno = lnno,@balance = TranTypeAmt

FROM #Instcoll WHERE Isnull(process, '') <> 'Y' AND effdt = @Effdt

SELECT @InstlmtDueDt = Min(InstlmtDueDt) FROM #custDue WHERE process <> 'Y'

SELECT @InstAmt = TotInstlmtAmt,@LnNo = LnNo

FROM #custDue WHERE process <> 'Y'

AND InstlmtDueDt = @InstlmtDueDt

UPDATE #Instcoll SET balance = @balance - @instamt, process = 'Y'

FROM #Instcoll WHERE LnRcptNo = @RcptNo AND effdt = @effdt

UPDATE #custDue SET process = 'Y', status = 'U',CollRcpt = @RcptNo,CollDt = @effdt,collamt = @balance

WHERE LnNo = @LnNo AND InstlmtDueDt = @InstlmtDueDt

SET @balance=@balance - @instamt

if @balance=0

break;

select @balance

WHILE @balance > 0

BEGIN

SELECT @balance, @instamt, * FROM #Instcoll

WHERE pk_id = @inc --and process <> 'Y'

SET @balance =@balance - @instamt

SELECT @balance, @effdt, @InstlmtDueDt, @RcptNo

END

SET @rcptinc=@rcptinc + 1

END