York IDH072B21S Series Installation And Maintenance Manual page 40

● The total number of connected indoor units is indicated on the LCD (Liquid Crystal Display). In
the case of a twin combination (set of two indoor units), the total number of the connected indoor
units is displayed as "2 units", and where there is a triple combination (set of three indoor units),
the total number of the connected indoor units is displayed as "3 units".
● If the number indicated is not equal to the actual number of connected indoor units, the auto-
address function is not performing correctly due to incorrect wiring or electrical interference. Turn
OFF the power supply, and resolve the wiring issue after verifying the following items; (Do not
repeat turning ON and OFF within a 10 second timespan.)
◦ The power supply to the indoor unit is not turned ON or there is an incorrect wiring issue.
◦ Incorrect connection of the interconnecting cable between indoor units or a poorly connected
controller cable.
◦ Incorrect setting of the rotary switch and DIP switch for the indoor unit printed circuit board
(PCB). (The setting is overlapped.)
● Press " On/Off" to start the Test Run.
● Press "
(b) Press " On/Off".
The RUN indicator turns ON and the operation starts. At this time, a two-hour OFF timer will be set
automatically.
(c) Though temperature recordings by the thermistors are invalid during the Test Run phase, the
protection devices are valid.
(d) For VRF System
According to the label; "Checking Method by 7-Segment Display" affixed to the inside of the front
cover of the outdoor unit, check temperature, pressure, and operation frequency, and interconnected
indoor unit numbers by 7-Segment displays.
(e) To complete Test Run, press "
set Test Run time to pass.
When changing the Test Run time, press " " or " " to select
"TEST TIME". Then, set the test run time (30 to 600 minutes)
by pressing " " or " ".
● The RUN indicator on the wired controller for the indoor unit will flash orange (0.5 second ON/ 0.5
second OFF), indicative of a fault or error having been generated with activation of protection devices
during the Test Run phase. Alarm code, unit model code, and the number of interconnected indoor
units will be displayed on the LCD as shown below. If the RUN indicator on the wired controller
flashes for two seconds ON and two seconds OFF, the source of the problem could be a failure in the
communication cable between the indoor unit and the wired controller (a loose or severed connection).
In this case, verify Section 9.3 "Alarm Code" and perform the appropriate troubleshooting measures.
Consult with an authorized service engineer if the problem cannot be resolved at your end.
Alarm Code:
MODEL : F .02
I.U.
IDU
ODU
O.U.
Sel.
36
" and set each item.
On/Off" again or wait for the
01-02
22
Chek
AlarmRst
: RCI-3.0FSN3
: ******
Address
: ******
: RAS-3HVRNM2
OP MODE Entr
OK
Test Run: 2 units
MODE
SPEED
Test Time
Inverter
Refrigerant Cycle No.
of Indoor Unit Having
Trouble
01 - 02
22
Alarm Code:
MODEL : F . 02
Unit Model Code
Unit Model Code
The relationship between the unit model code
and the unit model is shown in the table below.
Indication
F
E
COOL
AUTO
120min
60Hz
Sel. Adj. OFF
Indoor Unit No. of Indoor Unit
Having Trouble
Alarm Code No.
Total No. of Indoor Units in the
Same Refrigerant Cycle as the
Indoor Unit Having Trouble
Unit Model
VRF System
Except Above Models
P01432Q-rev.1