Grundfos Unilift CC 5 M1, Unilift CC 7 M1, Unilift CC 9 M1, Unilift CC 7 A1, Unilift CC 5 A1 Service Instructions Manual

Service instructions

Unilift CC

1 / 8

96581224 0406

GB

8

Contents

1. Identification .................................................................................................................................... 2

1.1 Nameplate ......................................................................................................................................... 2

1.2 Type key............................................................................................................................................ 2

2. Fault finding............................................................................. .... ... ... ... ... .... ... ... ... ........................... 3

3. Cleaning the pump .......................................................................................................................... 4

3.1 Cleaning the suction strainer............................................................................................................. 4

3.2 Cleaning the impeller......................................................................................................................... 4

4. Dismantling and assembly ............................................................................................................. 5

4.1 Removing the motor .......................................................................................................................... 5

4.2 Replacing the capacitor ..................................................................................................................... 5

4.3 Replacing the impeller....................................................................................................................... 5

4.4 Replacing the supply cable or float switch......................................................................................... 6

4.5 Fitting the motor................................................................................................................................. 6

5. Winding resistances....................................................................... ... ... ........................................... 7

6. Drawing............................................................................................................................................. 8

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1. Identification

1.1 Nameplate

1.2 Type key

TM03 1001 0905

Pos. Description Pos. Description

1 Pump type 8 Maximum flow rate
2 Frequency 9 Motor insulation class
3 Maximum head 10 Enclosure class
4 Maximum liquid temperature during continuous operation 11 Approvals
5 Product number 12 Motor input power
6 Production code 13 Maximum installation depth
7 Full-load current 14 Supply voltage

Example Unilift CC 7 A1

Pump range
Type
Maximum head [m]
Operation

A1 = Automatic
M1 = Manual

1

3

5

14

11

8

7

13

12

10

T ype

1 x 220 - 240

V~

40 °C

m

9

IP

PC 0540

P171XXXX

Class

I

1/1

3,7 A

Model

P

1

780 W

14

3

f 50 Hz

Unilift CC9 - A1

96280970

H

max

Q

max

m/h

10 m

T

max

U

DIN EN12050-2

LGA

68

SN XXXXXXX

Made in Italy

PC 0540

F

A

R

56

2

9

4

6

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2. Fault finding

Switch off the electricity supply before dismantling the pump.

Fault Cause Remedy

1. Pump does not
run.

a) Electricity supply switched off. Switch on the electricity supply.
b) Fuses in installation blown. Replace defective fuses.
c) The pump thermal switch has tripped out. The thermal switch restarts the pump when the motor has

cooled to normal temperature.

d) The main winding is defective, see 5. Winding resist-

ances.

Replace the motor, see 4.1 Removing the motor.

2. The pump does
not run, but hums.

a) The capacitor is defective. Replace the capacitor, see 4.2 Replacing the capacitor.

Replace the motor, 4.1 Removing the motor.

b) The auxiliary winding is defective.

3. The pump stops
after short time of
operation (ther­mal switch tripped
out).

a) The pumped liquid temperature is too high. The pump restarts automatically after sufficient cooling.
b) Pump partly blocked by impurities or blocked. Clean the pump, see 3.2 Cleaning the impeller.
c) Water level too low when the pump is started. The

pump cannot self-prime.

Move the pump to a position with higher water level or add
water until the pump starts sucking.

4. Pump runs but
gives insufficient
water.

a) Pump is partly blocked by impurities. Clean the pump, see 3.2 Cleaning the impeller.
b) Discharge pipe/hose partly blocked by impurities. The

hose may be sharply bent.

Check and clean the non-return valve, if fitted.

c) Impeller, bottom part or diaphragm defective. Replace defective parts.

5. Pump runs but
gives no water.

a) Pump is blocked by impurities. Clean the pump, see 3.2 Cleaning the impeller.
b) Non-return valve in discharge pipe/hose blocked in

closed position or blocked by impurities. The hose may
be sharply bent.

Check the non-return valve. Clean or replace the valve, if
necessary.

c) Pumps with float sw itch:

The pump does not stop because the free cable length
of the float switch is too long.

Reduce the free cable length.