12-7
CONTROL SYSTEM
SM HAFRPM 2-A.1 GB
Recover from the thermistor faults
1. ICT/OCT/RAT is disconnected or shorted –
The fault status will be cleared automatically when the connection is back to normal.
2. ICT/OCT reading doesn’t change -
The ICT no-change error is cleared automatically if a 3
o
c change in ICT is detected
afterward. Similarly, the OCT no-change error is cleared by a change in OCT.
This faults can also be cleared by switching the unit from STBY mode to operate
mode, or when the unit is reset (e.g. reset by power interrupt).
12.4 COOLING MODE
12.4.1 Cooling Mode – General
a.
Room Temperature, RT, is detected by
x
RAT in normal operation, or
x
RCT (R/C sensor) in I-FEEL mode.
b.
The resolution of RT is 1
o
c.
x
RT is activating COMP if (RT > SPT), and
x
RT is stopping COMP if (RT =< SPT).
c.
Indoor Coil Temp is detected by ICT (RT2).
d.
Outdoor Coil Temp is detected by OCT (RT3).
e. OFAN
OPERATIONS
x
OFAN starts together with COMP in general.
