AEG MC17-MV17 User Manual

Handbook Handbok Handbuch Manuel

MAXIMA

MC17-SA, MC17-BA,

MV17-SA, MC25-SA

36 23 501-01 (G)

Carrier CR Hungary Ltd
PO Box:23
H-5123 Jászárokszállás, Hungary
Tel [phone]
Fax [phone]

MC17/MV17

MC25

Product safety

Application

The cabinet is meant for packaged chilled foodstuffs
and shall not be used for storage of other products.

Design and testing

The cabinet is CE-marked and complies with valid EU­directives (low voltage directive and electro magnetic
compatibility directive). All cabinets have been tested
regarding electrical earthing and insulation. They have
also been tested (pressure tested) regarding the
evaporator and condenser. The cabinet has been test
run regarding function and leakage.

Service and repair

Service and repair (except cleaning) must only be
made by persons qualified to carry out service work on
the product and who knows the function and design of
the cabinet. These are responsible that the safety is not
impaired. Special notice should be attended to

· earth connection

· insulation resistance

· exchanged components must be equivalent with

the original component

When servicing the refrigerant circuit please note that

· the work must only be done by persons with
certified competence, and in accordance with
national regulations.

· the refrigerant must not be discharged to the
atmosphere

· Discharging and charging of refrigerant must be
made through the schrader valve, with the
refrigerant in liquid phase

Description of function

Operation

The refrigeration is made with the help of fin coils in the
bottom and fan assisted air circulation. The air is
sucked in through the grille in front of the bottom shelf
and is discharged cooled partly through the perforation
in back and ceiling plates and partly through the air
supply in front of the ceiling plate. The evaporator fans
(M2.1) are in operation continuously.

For MC17 and MC25, there is a thermostat (S1, see
page 9) which controls both the timer (S4) and the both
compressors (M1.1 and M1.2) for regulation of the
temperature. The control of the timer means defrost
interval based on the compressor operation time.
Compressor 2 (M1.2) is controlled by the relay (K1),
which is controlled by the thermostat and a relay. The
time delay delays the relay and the start of compressor
2 with 10 seconds at each thermostat and timer cut-in.
The relay also controls the condenser fans (M2.2).
MV17 has only one compressor and therefore no delay
relay. At compressor operation the air circulates in the
machine compartment from the air supply grille,
through condenser and is discharged at the back.
When the compressor standstill this flow is reversed in
order to clean the condenser surface.

Temperature, pressure and flow for the system during
operation when the thermostat cuts-out are shown on
page 8.

Defrost

The frost is melted with the help of air circulation from
the evaporator fans, which operates also during
defrost.

· Charging with another refrigerant than the stated
must not be made without the approval of
Carrier.

36 23 501-01 (A) 2

Defrost is initiated by the defrost timer, which via the
relay cuts out the compressors. Defrost is terminated
by the defrost timer when the set time has elapsed.
Defrost to some extent also takes place when the
thermostat disconnects the compressors. At defrost the
product temperature rises with some degree.

Settings

(Set values see "Technical Data")

Operating thermostat

The thermostat is set using the knob in the thermostat
house, so that the knob figure points to the index on the
panel plate.

Common reasons for disturbances
in operation

Temperature too high

· Mains fuse blown due to other equipment also being

connected.

· Influence of draught and/or heating sources? See

page 4

· Overloaded?

· Dust laden condenser?

· Air circulation blocked? See page 4

· Condenser fan defective?

· Operation sensor defective (or incorrect set)?

· Defective relay or time relay?

· Compressor has a defective start relay?

· Compressor defective?

Defrost problems

· Defective defrost sensor (no defrost)?

· The thermostat is set colder than pos. 3?

Summary of warranty conditions

Faults occurring during the warranty period are covered
by the warranty with the exception of;

· Transport damages and fair wear and tear

· Adjustment of thermostat and timer

· Fuses, fluorescent tubes, starters or similar

· Problems in connection with an incorrect installation,

abnormal use and non-maintenance.

Repair instruction

Replacement of compressor

· Move the service pipe with the schrader valve to
the new compressor

· Always exchange the drier

Replacement of thermostat

· Carefully lift and remove the front glass.

· Loosen the 3 screws, placed in the slot for the front

glass.

· Loosen the 2 screws under the lower front.

· Remove the front.

· Remove the sealing of the bulb tube, and which is

inserted at the back of the cabinet.

· Pull out the bulb tube.

· Loosen the thermostat knob.

· Loosen the 2 cables on the thermostats left side.

· Loosen and remove the old thermostat.

· Mount the new thermostat.

· Put back the 2 cables.

· Put back the thermostat knob.

MC17/MV17

MC25

· Insert the bulb tube through the right hole. Bend the

tube a little upwards and follow the ceiling until the
tube comes out on the back of the cabinet.

· Insert the bulb tube in the plastic tube until it reaches

the bottom.

· Seal the bulb tube with i.e. silicone to avoid humidity to

reach it.

· Remount in reverse order according to the first 4

points.

Replacement of fluorescent tube end wall

· Loosen the light sheet by loosening the 4 screws
holding it.

· Twist loose the fluorescent tube.

· Remount in reversed order.

Replacement of fluorescent tube in light

(This is only valid for MC17 and MV17)

box

· Loosen the light box, by loosening the 3 screws on the
roof holding the light box.

· Pull carefully apart the quick connection and remove
the light box.

· Loosen the 2 screws, underneath the light box, which
holds the end wall of the light box.

· Loosen the end wall.

· Loosen the screw, underneath the box, which holds

the opal sheet.

· Pull gently out the opal sheet.

· Twist loose the fluorescent tube.

· Remount in reversed order.

Replacement of mains cable

· Loosen the lower front (see replacement of
thermostat)

· Loosen the 2 screws holding the mains cable.

· Loosen the mains cable from the plinth.

· Fasten one thread or similar in the mains cable (to

simplify the reassemble).

· Pull out the mains cable from the back of the cabinet.

· Fix the thread in the new mains cable.

· Pull the thread from the front of the cabinet.

· Remount in reversed order.

Replacement of condenser fan

· Loosen the lower front (see replacement of
thermostat).

· Loosen the compressor by loosening the 3-spring
pins.

· Lift the compressor carefully a little outward.

· Loosen the fan (4 screws).

· Loosen the cable from the plinth.

· Remove the fan.

· Remount in reversed order.

36 23 501-01 (A) 3