Hitachi RPI-0.8FSG1 Service Manual page 338

OPTIONAL FUNCTION
(4.3 Outdoor Unit)
(3) Picking Up Compressor ON Signal
With this procedure the compressor operation signal can be picked up. The method is explained in
the figure below. The required part is the same part as in Table 4.7. Connecting relay contactors
RYa are closed at the time of compressor running. This signal can be applied to the check of signals
at the time of remote controlling and to the fan interlock of outdoor fresh air.
(4) Picking Up Defrosting Signal
With this procedure the defrosting signal can be picked up. The method is explained in the figure
below. The required part is the same as in Table 4.7. Connecting relay contactors are closed at the
time of defrosting.
4-34
Picking Up Compressor ON Signal
Picking Up Defrosting Signal