
The basic operation of this unit is controlled through the operation display panel on the front of the product.
Home Screen and Setting Items
No.
Classification
Item
Explanation
q
Displayed
value
Circulating fluid temperature
Indicates the current temperature
w
Compressor
Displays the operation and stop state of the compressor
e
Pump
Displays the operation and stop status of the pump
r
Tank fluid level
Indicates the tank fluid level with 3 levels: “Sufficient,” “Low,” or “Insufficient”
“Sufficient”
Blue
“Low”
Yellow
“Insufficient”
Red
t
Circulating fluid flow rate
Indicates the fluid flow rate
This value is not measured by a flow meter.
It should be used as a reference value (rough indication).
y
Circulating fluid discharge pressure
Indicates the discharge pressure
u
Pressure gauge on the high-pressure side of the refrigeration circuit Displays the pressure gauge on the high-pressure side of the refrigeration circuit
i
Pressure gauge on the low-pressure side of the refrigeration circuit Displays the pressure gauge on the low-pressure side of the refrigeration circuit
o
Circulating fluid electric conductivity
Indicates the electric conductivity
∗
1
!0
Circulating fluid set temperature
Indicates the current temperature
!1
Button
Operation mode
To select an operation mode from the touch panel (
mode), an operation mode from the
contact input (
mode), or an operation mode from the serial communication (
mode)
!2
Independent pump operation
Operates the pump independently while the button is pressed
!3
Run/Stop
To run/stop the product
∗
1 When option “D” (Electric conductivity control) is purchased, a numerical value is displayed.
!0
q
w
e
r
!1
!2
!3
t
y
u
i
o
Alarm code
Explanation
AL01
Abnormally low tank fluid level
AL02
Low tank fluid level
AL06
Fan failure
AL09
Abnormal rise of circulating fluid temperature
AL10
Circulating fluid temperature rise
AL11
Circulating fluid temperature drop
AL12
TEMP READY alarm
AL17
Abnormal rise in heat exchanger inlet temperature
AL18
Failure of circulating fluid discharge pressure sensor
AL19
Circulating fluid discharge pressure rise
AL20
Circulating fluid discharge pressure drop
AL28 (Option “D” only)
Electric conductivity increase
AL29
Power supply failure
Alarm code
Explanation
AL30
Contact input 1 signal detection
AL31
Contact input 2 signal detection
AL34
Communication error
AL35
Outside of the ambient temperature range
AL36
Maintenance alarm
AL37
Compressor circuit failure
AL38
Sensor failure
AL39
Controller failure
AL40
Compressor inverter error
AL41
Compressor inverter communication error
AL42
Pump inverter error
AL43
Pump inverter communication error
5
HRS400
Series
Standard Type
Operation Display Panel
Alarm
This product may display the alarm messages shown in the table below.