HRX-OM-M090 
Chapter 2   Name and Function of Parts 
 
2.4 Operation display panel  HRS Series 
 
 
2-4  
2.4  Operation display panel 
The operation panel on the front of the product controls the basic operation 
of the product. 
 
 
Fig. 2-3    Operation display panel 
 
Table 2-3  Operation display panel 
No  Description  Function 
Reference 
page 
PV 
Displays the temperature and pressure of the circulating 
fluid and alarm codes. 
① 
Digital display 
(7 segment, 
4 digits) 
SV 
Displays the set temperature of the circulating fluid and 
the set values of other menus. 
5.2 
②  [ 
o
C  
o
F  ] lamp  Displays the unit of display temperature (℃ or 
o
F). 5.12 
③  [MPa    PSI] lamp  Displays the unit of display pressure (MPa or PSI).  5.13 
④  [REMOTE] lamp  Lights up during remote operation by communication.  5.18 
⑤  [RUN] lamp 
・Lights up when the product is started and in operation. Goes off 
when the product is stopped. 
・Flashes during stand-by for stop (Interval 0.5 seconds). 
・Flashes during independent operation of the pump (Interval 
0.3 seconds). 
・Flashes during anti-freezing function (At standby: Interval 2 
seconds, At operation: Interval 0.3 seconds). 
4.4 
⑥  [ALARM] lamp  Flashes with buzzer when alarm occurs (Interval 0.3 seconds).  5.3 
⑦ 
  [        ] lamp  Lights up when the tank level indicator falls below the LOW level.  4.3 
⑧ 
 [   ] lamp  Lights up while the run timer or stop timer function is working.  5.6 
⑨ 
 [   ] lamp 
Lights up when the product is in automatic operation. 
5.9 
⑩  [RUN/STOP] key 
Makes the product start or stop. 
4.4 
⑪  [MENU] key 
Shifts the main menu (display screen of temperature) the other 
menu (entry of set values and monitor screen). 
⑫  [SEL] key 
Changes the item in menu and enters the set value. 
5.1 
⑬  [▼] key 
Decreases the set value. 
⑭  [▲] key 
Increases the set value. 
- 
⑮  [PUMP] key 
When the [MENU] and [RUN/STOP] keys are held down 
simultaneously, the pump starts running independently. 
4.3 
⑯  [RESET] key 
Keep the [▼] and [▲] keys pressed down simultaneously. This will 
stop the alarm buzzer and reset the [ALARM] lamp. 
6.3