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Product Introduction
Basic Functions - 30K & 36K 230 volt
2. In the case of Tindoor amb <75F : if Ttube < 108F, the indoor fan will run at low speed, and after one
minute, the indoor fan will be converted to preset speed. Within one-minute low speed operation, if Ttube
> 104F, the indoor fan will be converted to preset speed.
Note: Tindoor amb indicated in and refers to, under initially heating mode, the indoor ambient
temperature before the command to start the compressor is performed according to the program, or after
the unit is withdrawn from defrost, the indoor ambient temperature before the defrost symbol is cleared.
• Total current up and frequency down protection
If the total current Itotal < 16A, frequency rise will be allowed; if Itotal > 17A, frequency rise will not be
allowed; if Itotal > 18A, the compressor will run at reduced frequency; and if Itotal > 20A, the compressor
will stop and the outdoor fan will stop with a time lag of 60s.
(4) Fan mode
Under the mode, the indoor fan will run at preset speed and the compressor, the outdoor fan, the four-way valve and
the electric heater will stop.
• Under the mode, temperature can be set within a range of 61-86ºF.
(5) AUTO Mode
A. Working conditions and process of AUTO mode
Under AUTO mode, standard cooling temperature Tpreset is 77ºF and standard heating temperature Tpreset is 68ºF.
a. Once energized, if Tamb < 71.6ºF, the unit will be started under heating mode; if 71.6ºF < Tamb <78.8ºF, the unit
will run under fan mode and the run indicator will be bright; and if Tamb > 78.,8ºF, the unit will be started under
cooling mode.
b. Under AUTO mode, if Tamb > T1.8ºF is detected, the unit will select to run under cooling mode, in which
case implicit preset temperature is 77ºF; if Tamb < Tpreset -1.8ºF, the compressor will stop, the outdoor fan will stop
with a time lag of 1 minute, and the indoor fan will run at preset speed; and if Tpreset -1.8ºF < Tamb < T1.8ºF,
the unit will remain at its original state.
c. Under AUTO mode, if Tamb < T3.6ºF is detected, the unit will select to run under heating mode, in which
case implicit preset temperature is 64ºF; if Tamb J> T9ºF, the compressor will stop, the outdoor fan will stop
with a time lag of 1 minute, and the indoor fan will run under the mode of residue heating blowing; and if Tpreset
+3.6ºF < Tamb < T41ºF, the unit will remain at its original state. The cooling-only unit will run under fan
mode.
d. Under AUTO mode, if 71.6ºF < Tamb < 78.8ºF, the unit will remain at its original state
B. Protection
a. In cooling operation, protection is the same as that under the cooling mode;
b. In heating operation, protection is the same as that under the heating mode;
c When ambient temperature changes, operation mode will be converted preferentially. Once started, the compressor
will remain unchanged for at least 6 minutes.
