Hitachi 3HRNM1Q Installation & Maintenance Manual page 31

Table 7.2 Checking of Wire Connection by Test Run
NOTE: "TEST RUN" shall be performed with each refrigerant cycle (each outdoor unit).
(1) Turn ON the power source of the units.
(2) Procedure for "TEST RUN" mode of remote control switch.
Depress the "MODE" and the "CHECK" switches together
for more than 3 seconds.
If "TEST RUN" and the counting number of the
connected units with the remote control switch
(for example "05") are indicated on the remote
control switch, the connection of remote control
cable is correct.
If no indication appears or the number of the units
indicated is smaller than the actual number of
the units, some abnormalities exist.
(3)
Remote
Control Switch
Indication
No Indication * The power source of outdoor unit is not turned ON.
* The connection of the remote control cable
is incorrect.
* The connecting wires of power supply line
are incorrect or loosed.
Counting * The power source of outdoor unit is not turned ON.
number of * The operating line wiring between indoor unit and
connected units outdoor unit is not connected.
is incorrect.
(4) Select TEST RUNNING MODE by depressing "MODE" switch. (COOL or HEAT)
(5) Depress "RUN/STOP" switch.
The "TEST RUN" operation will be started. (The 2 hours OFF-TIMER will be set and the "TEST RUN" operation
will be finished after 2 hours unit operation or by depressing the "RUN/STOP" switch again.)
NOTE:
The "TEST RUN" operation ignores the temperature limitation and ambient temperature during heating
operation to have a continuous operation, but the protections are alive.
Therefore, the protection may activate when the heating "TEST RUN" operation is performed in high ambient temperature.
If the units do not start or the operation lamp on the remote control switch is flashed,
some abnormalities exist.
(6)
Remote Control
Unit Condition
Switch Indication
The operation lamp The unit does not
flashes. (1 time/1 sec.) start.
And the Unit No. and
Alarm Code "03" flash.
The operation lamp The unit does not
flashes. (1 time/2 sec.) start.
Indication or flash The unit does not
except above. start, or starts once
and then stops.
The operation lamp The unit does not
flashes. (1 time/1 sec.) start.
And the Unit No. 00.
Alarm Code dd and
Unit Code E.00 flash.
G Alarm Code Indication of Remote Control Switch
Abnormal Ref.
Cycle No.
Abnormal Indoor
Unit No.
COOL MED
ADDS. RN
A/C
ALARM
Wrong Portions
Back to (1) after checking
Wrong Portions
The power source of outdoor unit
is not turned ON.
The connecting wires of operating
line are incorrect or loosed.
Remote control cable is broken.
Contact of connectors is not good.
The connection of remote control
cable is incorrect.
The connection of the thermistors
or other connectors are incorrect.
Tripping of protector exists, or elses.
The connection of the remote
control cable between indoor units
is incorrect.
Back to (1) after checking
Connected No.
Model Code
of Indoor Units
Alarm Code
COOL MED
ADDS. RN
Indicated
A/C
for a second
alternately
24
Setting Temperature
Operation Lamp
MODE
CHECK
Inspection Points after the Power Source OFF
1. Connecting Points of Remote Control Cable Terminal
Board of Remote Control Switch and Indoor Unit
2. Contact of Terminals of Remote Control Cable
3. Connecting Order of each Terminal Boards
4. Screw Fastening of each Terminal Boards
Inspection Points after the Power Source OFF
1. Connecting Order of each Terminal Boards
2. Screw Fastening of each Terminal Boards
NOTE:
Recovering method of FUSE for operating circuit.
There is a fuse ("FUSE4" on Indoor Unit PCB1, "EF1"
on Outdoor Unit PCB1) to protect operating circuit
on the PCB, when the power lines are connected to
operating lines.
If fuse is melted, operating circuit can be recovered
once by setting the dip switch on the PCB, as below.
Indoor Unit PCB1
DSW7
ON
OFF
1
* Set the switch #1 to ON position to recover the
operation circuit.
This is the same as items (3)-1 and 2.
Check by the abnormality mode table 7.3 and
(Do it by service people.)
table 7.4.
Check by the abnormality mode table 7.3 and
(Do it by service people.)
table 7.4.
Model Code
Indication
Alarm Code
ALARM
HIGH SET TEMP.
COOL
UNIT
A/C
CHECK
RUN / STOP
TEMP.
MODE FAN SPEED ON/OFF TIMER RESET
VENTI LOUVER CHECK
TIME
Remote Control Switch
2
Model
Heat-pump
Inverter
Multi
Cooling Only
Others