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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