SM-18006
3-123
TROUBLESHOOTING
3.4.4 Checking the Test Run
(1) Indoor and Water Source Fan
Check that the indoor fan and water source cooling fan rotate correctly and the airow is smooth.
(2) Power Supply Voltage
Check the power supply.
If the power supply is abnormal, contact the electric
power company.
Usually, voltage drop will occur when starting the
operation as shown in the gure (V
2
).
In order to protect the device, comply with the following
normal range of the power supply voltage.
<Normal Range of Power Supply Voltage>
• Supply Voltage: Rated Voltage < +10%
• Starting Voltage (V
2
): Rated Voltage > -15%
• Operating Voltage (V
3
): Rated Voltage < +10%
• Voltage Imbalance between Phase: < 3%
(3) Normal Operating Pressure
Normal operating suction pressure is 29 to 159.5 psi (0.2 to 1.1 MPa) and normal operating discharge
pressure is 145 to 507.6 psi (1.0 to 3.5 MPa) when the refrigerant charge quantity is correct. Check
the operation pressure in the test run mode.
(4) High Pressure Switch
Check the operation pressure of the high pressure switch in the table below.
(b) When the high pressure retry control is activated, alarm code “ ” is displayed on the 7-segment
display of the water source unit PCB. If the high pressure retry control occurs three times or more
within 30 minutes, alarm code “ ” is displayed on the LCD of the wired controller or the 7-segment
display of the water source unit PCB.
(5) High Pressure Increase Retry (Protection Control)
(a) High pressure will increase when the following procedure is performed.
Refrigerant Operation Pressure
R410A 601 psi (4.15MPa)
Initial Voltage
(V
1)
Starting Voltage
(V
2)
Operating Voltage
(V
3)
Cover the air inlet of indoor unit
during heating operation.
NOTE:
High pressure may not increase until the high pressure switch is activated because of the
temperature condition.
< For CIW01 >
Sel. OP MODE
I.U. :
RCI-3.0FSN3
MODEL : F .02
Alarm Code:
45
O.U. :
RAS-3HVRNM2
01-02
AlarmRst
Address
Entr
IDU :
******
ODU :
******
Chek
OK
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