LREQ5~20B7Y1
Air cooled refrigeration condensing unit
4PW74303-1C – 2016.02
Operation manual
6
10. AFTER-SALE SERVICE
10-1 After-sale service
WARNING
Consult your local dealer regarding modification, repair and
maintenance of the condensing unit.
Improper workmanship may result in water leakage, electric shocks
or fire hazards.
Consult your local dealer regarding relocation and
reinstallation of the condensing unit.
Improper installation work may result in leakage, electric shocks or
fire hazards.
Beware of fire in case of refrigerant leakage.
If the condensing unit is not operating correctly (i.e. the interior
temperature of the condensing unit does not drop efficiently),
refrigerant leakage could be the cause.
Consult your dealer for assistance.
The refrigerant used for the condensing unit is safe and normally
does not leak.
However, if the refrigerant leaks and gets in contact with a naked
burner, heater or cooker, it may generate hazardous compounds.
Turn off the condensing unit and call the dealer. Make sure to turn
on the condensing unit after the qualified service person confirms
that the leakage is repaired.
1. Inform your dealer of the following items when you request
repairs.
•
Model name
Described in the warranty card.
•
Serial number and date of installation
Described in the warranty card.
•
Defective condition – as precise as possible
•
Your address, name, and telephone number
2. Repairs after expiration of warranty period
Consult your dealer. Onerous repairs will be possible if the unit
can maintain its original functions after the repairs are made.
3. Maintenance inspection
The interior of the refrigeration condensing unit will become dirty
and its performance may be degraded if it is used for several
seasons.
We recommend to check all pressure containing parts yearly. In
case of corrosion, contact your dealer.
The disassembly and internal cleaning of the unit requires
specialized techniques. Therefore, our dealer recommends an
onerous maintenance inspection besides usual maintenance
services.
For details, consult your dealer.
Keep in mind that our dealer’s warranty may not cover
malfunctions resulting from the disassembly or internal cleaning
of the unit conducted by contractors not authorized by our dealer.
4. Relocation and disposal
•
Contact your dealer for removing and reinstalling the system
condensing unit since they require technical expertise.
•
The system condensing unit uses fluorocarbon refrigerant.
Contact your dealer for discarding the system condensing unit
since it is required by law to collect, transport and discard the
refrigerant in accordance with relevant local and national
regulations.
•
In either case, consult your dealer.
5. Inquiries
Contact your dealer for after-sale services.
10-2 Onerous repairs
(Outside scope of warranty coverage)
10-2-1
Accidents resulting from use beyond standards
for use
•
Use beyond Limits
•
Applications other than its designed purpose of use or modification.
Standards for use
Condensing unit
Restrictions for the refrigeration-side
Note:
*1
. Connection piping length differs according to set value of
evaporating temperature.
Set the total value of the internal volume for the evaporator
(refrigerator/freezer) to connect and the amount of refrigerant
inside the evaporator that can be recovered in the condensing unit
by closing the liquid solenoid valve installed on the
refrigeration-side to the below amount or lower.
LREQ5, 6:
22 l
LREQ8, 10, 12:
33 l
LREQ15, 20:
42 l
*2
. When the outdoor temperature is lower than evaporating
temperature, evaporating temperature is lower than set
evaporating temperature
*3
. Trap is required at 5 m intervals from outdoor unit.
Item
Standard for use
Refrigerant
R410A
Refrigeration oil
Daphne FVC68D
Range of evaporating
temperature (Te)
–45°C ~ +10°C (
*2
)
Range of outdoor temperature
–20°C ~ +43°C
Suction gas superheated degree
10 K or higher
Suction gas temperature
20°C or lower
Power supply
Voltage
regulation
within ±10% of rated
voltage
Voltage
imbalance
rate
within ±2% of rated voltage
Frequency
regulation
within ±2% of rated
frequency
Compressor ON/OFF frequency
6 times or less/hour
Connection piping length (piping
equivalent length) (
*1
)
130 m or lower
(Te = –20°C ~ +10°C)
100 m or lower
(Te = –45°C ~ –20°C)
Max. difference in height
between indoor and outdoor
units
35 m or lower (
*3
)
(When the condensing unit
is installed higher than the
refrigeration-side)
10 m or lower
(When the condensing unit
is installed lower than the
refrigeration-side)
Installation space
According to the
installation service space
Connectable
minimum load
capacity
2.0 kW or higher (Te = –20°C ~ +10°C)
1.6 kW or higher (Te = –45°C ~ –20°C)
Liquid solenoid
valve installed
upstream of
expansion valve
For R410A, maximum operating pressure
difference: 3.5 MPa or higher
It is necessary to control the solenoid
valves in indoor unit using “Operate unit” of
outdoor unit
Defrost method
Hot gas defrost not possible
After defrosting ends, resume operation of
the refrigeration-side blower within 3
minutes or less
Restrictor
Use a thermal expansion valve for R410A
4PWEN74303-1C.book Page 6 Thursday, March 10, 2016 10:59 AM
