Hot Keep Operation - Mitsubishi SCM40ZS-S Technical Manual

(i) Level input
If the factory settings (Jumper wire J1 external input on the PCB of indoor unit) are set, or "LEVEL INPUT" is se-
lected in the wired remote control's indoor unit settings.
1) Input signal to CnT OFF → ON
2) Input signal to CnT ON → OFF
CnT input
Unit
(Case A)
Unit
(Case B)
(ii) Pulse input
When Jumper wire J1 on the PCB of indoor unit is cut at the field or "PULSE INPUT" is selected in the wired remote
control's indoor unit settings.
Input signal to CnT becomes valid at OFF → ON only and the motion of air-conditioner [ON/OFF] is inverted.
CnT input
Unit
(Case A)
Unit
(Case B)

(19) Hot keep operation

During the heating operation, the indoor fan speed can be is controlled based on the temperature of the indoor heat exchanger
(Th2) to prevent blowing out of cold air.
(20) Frost prevention control
(a) Operating conditions
(i)
(ii) 8
(b) Detail of anti-frost operation
Operation mode
Item
Compressor operation
Indoor fan
(c) Reset condition
Air-conditioner ON
Air-conditioner OFF
ON
OFF
ON
OFF
*ON
ON
ON
OFF
OFF
ON
OFF
ON
OFF
Protective control
Forced outage
159
-
ON
OFF
OFF
*ON
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
2.5
Reset
Operation instruction
Depends on operation mode
-
'16 • SCM-T-199
Note (1) The ON with the * mark indi-
cates an ON operation using the
wired remote control, etc.
Reset
Protective
control
2.5 8
Indoor heat exchanger
temperature (ºC)