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SERVICE MANUAL EIS 165.3 N/P KW (short version) inglese
Autori: Serralunga M.
14/10/2021
10
NO COPYING IN ANY FORM WITHOUT WRITTEN PERMISSION FROM EPTA QUALITY MANAGEMENT
4. ALARMS FOR EIS 165.3 N/P KW (Dixell Contreller)
ALARM CAUSE
OUTPUTS
“P1”
Temperature probe damage
“Con” and “COF” compressor outputs.
“P2”
Evaporator probe damage
Timed defrosting
“HA”
Maximum temperature alarm
Outputs unchanged
“LA”
Minimum temperature alarm
Outputs unchanged
Probe alarms
P1
and
P2
start some seconds after the fault in the related probe; they automatically stop
some seconds after the probe restarts normal operation. Check connections before replacing the probe.
Temperature alarms
HA
and
LA
automatically stop as soon as the temperature returns to normal values.
5. REPLACEMENT OF COMPONENTS AND REPAIR OF A LEAK
The instructions below, which involve opening the refrigerating circuit, must be performed in a
place with sufficient air circulation and at any rate not in the sales area.
5.1
SAFE OPERATING PROCEDURES FOR REFRIGERATION UNITS
USING R290
Before carrying out any kind of maintenance operation on the refrigerator, make sure that the
machine is disconnected from power (unplugged).
R290 (Propane CH3CH2CH3) is a flammable natural refrigerant (Hydrocarbon HC) having
lower explosive limit ( LEL %V/V) = 1.7.
The very low quantity of refrigerant used and the safe design (possible ignition sources
enclosed in a metal box, far from the potential explosive areas) make this unit totally safe in
use. Caution must be used during servicing and with this respect it is essential to understand
the basic concept of flammability.
Three ingredients are needed for a fire: a fuel at the right concentration, a supply of oxygen
normally from air, and a source of ignition. The common way of illustrating this is by means of
the fire triangle.
If you control these components, for example, by eliminating at least one but preferably two
of these, fire can be prevented.
In order to achieve this, three general guidelines should be followed during servicing:
F1. Containment of the substance;
F2. Avoidance of ignition sources;
F3. Use of ventilation.