Hitachi RCUE40AG2 Service Manual page 109

Troubleshooting
Example of code indication (alternately
Item
Refrigerant liquid Refrigerant liquid


Outlet water temp
(backside of heat
exchanger of water
side)
 
Fan control state Fan control state




The following operation makes change from alarm data indication mode to normal mode.
1. Press [▲] (SW3) [▼] (SW4) more than 3 sec.
2. In case that un-input state continues 30 seconds.
The following operation makes change from alarm data indication mode to alarm occurrence data mode.
1. Press [▼] (SW4) more than 3 sec.
Electron expansion valve opening indication

By pressing [Ο] (PSW1) on PCB for electron expansion valve more than 3 seconds, actual expansion valve
order opening (pulse) is indicated on the segment. (it is possible during stop / operation)
Once pulses are displayed, pushing again PSW1 enables you to check each cycles expansion valve
position.
PWB (VD PCB)
G
* Light off by pressing [Ο] more than 3 seconds.
pag. 107
SMGB0003 rev.0 - 01/2007
fl icker)
 
 
 

 
 
 
Segment for check
Check switch
Contents
Outlet water temp (backside of heat exchanger of

water side) [ºC]
-In case of No. 1 outlet water temp is 7ºC
 -In case of No. 2 outlet water temp is 7ºC
Indication of electron expansion valve opening
-In case of No. 1 opening is 242 pulse.

-In case of No. 2 opening is 240 pulse.
Press it more
than 3 sec.
PULSES
10 (Thermo OFF)
112 (Min. running value)
656 (Max. running value)
5 5
Flicker
alternately
OPENING %
1,5 %
17%
100%