55
ENGLISH
h : HR unit # : HR unit number
Display Title Cause of Error
HR Unit related error
2 0 0 1 Searching pipe Error Failure of automatic addressing of valves
201
#HR + h
HR unit1 Liqiud sensor error Liquid pipe sensor of HR unit open or short
202
#HR + h
HR unit1 Sub Cooling Pipe sensor error Sub Cooling Pipe In sensor of HR unit open or short
203
#HR + h
HR unit1 Sub Cooling Pipe Out sensor error Sub Cooling Pipe Out sensor of HR unit. open or short
204
#HR + h
Communication error Failing to receive HR unit signal at outdoor unit
205
#HR + h
Communication error between HR unit and the
upgraded 485 modem.
4 series upgraded 485 communication error between
HR unit and HR unit modem
206
#HR + h
Duplicate address error of HR unit
When the HR unit address is set duplicated at the 4 series
upgraded 485 communication
207
#HR + h
Communication error between Master and Slave
Main PCB of HR Unit
When fail to communication between Master and Slave Main PCB
of HR Unit
208
#HR + h
Communication error of EEPROM of HR Unit When fail to communication of EEPROM of HR Unit
Network error
2 4 2 * Network error of cntral controller Communication wiring defect
Checking procedure of limiting concentration
Check limiting concentration along following steps and take
appropriate measure depending on the situation.
Calculate amount of all the replenished refrigerant (kg) per each
refrigerant system.
Calculate minimum room capacity
Calculate room capacity by regarding a portion as one room or the
smaller room.
- With partition and with opening
which serve as passage of air to
adjoining room
- Without partition
Limiting concentration is the limit of Freon gas concentration
where immediate measures can be taken without hurting human
body when refrigerant leaks in the air. The limiting concentration
shall be described in the unit of kg/m
3
(lbs/ft
3
) (Freon gas weight
per unit air volume) for facilitating calculation.
Limiting concentration: 0.44 kg/m
3
(0.028 lbs/ft
3
)(R410A)
Amount of additional
replenished refrigerant
Total amount of replenished
refrigerant in refrigerant
facility (kg)
+
=
Note : In case one refrigerant facility is
divided into 2 or more refrigerant
systems and each system is
independent, amount of replenished
refrigerant of each system shall be
adopted.
Amount of replenished
refrigerant per one outdoor
unit system
Amount of replenished
refrigerant at factory shipment
Amount of additionally
replenished refrigerant
depending on piping
length or piping
diameter at customer
Outdoor unit
Indoor unit
Opening
Partition
In the case of opening
without door, or 0.15 %
or more openings
(to floor space) both
above and below door)
Outdoor unit
(No.1 system)
Flow of
refrigerant
Indoor unit
Room where refrigerant leaks
(Refrigerant of the whole No.1
system flows out.)
The installer and system specialist shall secure safety against leakage
according to local regulations or standards.
The following standards may be applicable if local regulations are not
available.
Introduction
Though the R410A refrigerant is harmless and incombustible itself, the
room to equip the air conditioner should be large to such an extent that
the refrigerant gas will not exceed the limiting concentration even if
the refrigerant gas leaks in the room.
Limiting concentration
- With partition and without opening which serve as passage of air to
adjoining room
Calculate refrigerant concentration
Total amount of replenishedrefrigerant
in refrigerant facility [kg(lbs)]
Volume of smallest room where indoor
unit is installed [m
3
(ft
3
)]
- In case the result of calculation exceeds the limiting concentration, perform
the same calculations by shifting to the second smallest, and the third
smallest rooms until at last the result is below the limiting concentration.
= Maximum concentration limit[kg/m
3
(lbs/ft
3
)]
(R410A)
Outdoor unit
Indoor unit
Smallest
room
CAUTION FOR REFRIGERANT LEAK
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