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OUTDOOR UNITS
2-22
TC-16001-rev.5
< Defrost Operation >
The following defrost operations, “Standard Defrost”, “Forced Defrost” and “Manual Defrost” are available.
(1) Standard Defrost
This operation starts according to the outdoor temperature, the outdoor evaporating temperature and
the operating time.
(2) Forced Defrost
This operation starts when the indoor unit repeats Thermo-ON/OFF* operation and therefore cannot
start the “Standard Defrost.”
(3) Manual Defrost
This operation starts when the push switch “PSW1” on the outdoor unit PCB is pressed for more than
3 seconds during maintenance, etc. (This function cannot be used when the pressure and the outdoor
evaporating temperature is high or at the beginning of the operation.)
NOTE:
Do not repeatedly use “Manual Defrost” frequently.
* Thermo-ON: The outdoor unit and some indoor units are running.
Thermo-OFF: The outdoor unit and some indoor units stay on, but don’t run.
Table 2.1
CH
Crankcase Heater
in O.U.
FS
Float Switch
in I.U.
YH2
Relay for Drain Pump Motor
in I.U.
MD
Drain Pump Motor
in I.U.
MIF
Indoor Fan Motor
in I.U.
Y52C
Relay for Magnet Switch
in O.U.
CMC
Magnet Switch
in O.U.
MC
Compressor Motor
in O.U.
MOF
Outdoor Fan Motor
in O.U.
RVR
Reversing Valve
in O.U.
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