Hitachi RAS-10HRNM, Service Manual, Page: 178 / 482

A. Maximum rotation (rotating speed)
B. Outdoor temp (ºC)
N O T E
• The maximum rotation (rotating speed) is always 100% for the standard unit. (No limitation of the outdoor
temperature).
• Change of defrost operation conditions
This function allows to change the operation conditions in defrosting mode.
The change is shown in the following illustrations:
Normal defrosting condition Optional defrosting condition
Temperature
conditions
under defrost
operation.
When change
of defrost
condition is
NOT set.
Temperature
conditions
under defrost
operation.
When change
of defrost
condition is set
A. Outdoor evaporator temperature ºC (pipe).
B. Defrosting operation stop area.
C. Outdoor temperature (ºC).
D. Defrosting operation start area.
• Fixing of frequency
No setting for this function is available.
• Cool draft protection 1
This function can be activated, when the minimum discharge Air temperature falls down to 8 ºC in cooling operation.
Outdoor fan stop and compressor frequency forcibly declines to prevent discharge air temperature from dropping.
• Cool draft protection 2
This function can be activated, when the minimum discharge Air temperature falls down to 10 ºC in cooling operation.
Compressor stop. In this case stoppage code Nº 24 is given.
• Optional functions (jumper).
– New working range temperature in cooling mode (Only for RAS-(8–12)HRNM).
When this function is activated, the working range in cooling mode will increase until –15 ºC. (Not available the
individual indoor control).
To activate this option the jumper JP1 of the outdoor unit PCB1 must be cut.
– Fixing cooling mode
6 Optional functions
170
SMGB0060 rev. 1- 12/2010