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SYSTEM OPERATING CONDITIONS
Table 11—System Operating Conditions
OPERATING RANGE MIN / MAX °F (°C)
COOLING
Outdoor DB
-4/122 (-20/50)
NOTE:
S
If the air conditioner is used beyond the above
conditions, certain safety protection features may engage
and cause the unit to operate abnormally.
ELECTRONIC FUNCTIONS
Main Protection
Three Minute Delay for Compressor Restart
Less than a 1 minute delay for the initial start−up and a 3 minute
delay for subsequent starts.
Compressor Top Temperature Protection
The unit stops working when the compressor top temp. protector
cuts off, and restarts after the compressor top temp. protector
restarts.
Compressor Discharge Temperature Protection
When the compressor discharge temp. increases, the running
frequency is limited per the following rules:
S
Compressor discharge temp. T5>239
compressor stops and restarts up until T5<194
S
110<T5<239
° F(
115
° C
lower level every 2 minutes.
S
221
°
F(105
° C
)<T5<230
current frequency.
S
T5<221
F(105
), no limit for frequency.
°
° C
Fan Speed is Out of Control
When the indoor fan speed remains low (lower than 300RPM) for
50s, the indoor fan shuts off and restarts 30s later. If the protection
mode engages 3 times when the fan motor restarts continuously,
the unit stops and the LED displays the failure.
When the outdoor fan speed remains low (lower than 100RPM) or
too high (higher than 1500RPM) for 60s, the unit stops and the
LED displays the failure. The malfunction clears 30s later.
Inverter Module Protection
The inverter module has a protection function for current, voltage and
temperature. If any of these protections engage, the corresponding
code displays on the indoor unit and the unit stops working.
Indoor Fan Delayed Open Function
When the unit starts up, the louver is active immediately and the
indoor fan opens 10s later. If the unit is running in the HEATING
mode, the indoor fan is controlled also by the anti−cold wind function.
Compressor Preheating Functions
Preheating Permitting Condition:
＜
If T4
37.4
F(3
) and the machine connects to power supply newly
°
° C
＜
within 5 seconds or if T4
37.4
stopped for over 3 hours, the compressor heating cable will work.
Preheating Mode:
A weak current flow through the compressor coil from the
compressor wiring terminal, then the compressor is heated without
operation.
Preheating Release Condition:
≥
If T4
41
F(5
) or the compressor starts running, the preheating
°
° C
function stops.
HEATING
-4/86 (-20/30)
(115
) for 5s,
° F
° C
F (90
°
° C
), decrease the frequency to the
°
F(110
° C
), keep running at the
F(3
) and the compressor has
°
° C
Condenser High Temperature T3 Protection:
S
131
F(55
°
° C
frequency decreases to the lower level until to F1 and
then runs at F1. If T3<129.2
keeps running at the current frequency.
S
T3<125.6
F(52
°
frequency and resumes the former frequency.
S
T3>140
F(60
°
until T3<125.6
Evaporator Low Temperature T2 Protection:
S
T2<32
F(0
°
° C
≥
T2
41
°
F(5
S
32
F(0
)≦T2<39.2
°
° C
is limited and decreases to the lower level
S
39.2
°
F(4
° C
)
the current frequency
S
T2>44.6
F(7
°
limited.
Operation Modes and Functions
Fan Mode
1 Outdoor fan and compressor stop.
2 Temperature setting function is disabled and no setting
temperature is displayed.
3 Indoor fan can be set to high/med/low/auto.
)
4 The louver operates the same as in COOLING mode.
5 Auto fan
28 (82.4°F)
26 (78.8°F)
25 (77°F)
23 (73.4°F)
22 (71.6°F)
20 (69°F)
19 (66.2°F)
17 (62.6°F)
Fig. 14 – Outdoor Fan Running Rules
14
)<T3<140
F
60
), the compressor
°
(
° C
°
F(54
° C
), the compressor
), the compressor does not limit the
° C
) for 5 seconds, the compressor stops
° C
°
F(52
° C
).
), the compressor stops and restarts when
° C
).
F(4
), the compressor frequency
°
° C
≤
T2<44.6
°
F(7
° C
), the compressor retains
), the compressor frequency is not
° C
Fig. 13 – Fan Mode
A
A
DC_FAN_HI_SPD_ADD
ADD
D
D
D
D
D
D
D
D
D
D
D
DD
B
B
DC_FAN_MID_SPD_ADD
_A
C
C
DC_FAN_MIN_SPD_ADD
_ADD
D
D
DC_FAN_SLOW_SPD_ADD
PD_A
E
E
DC_FAN_SSLOW_SPD_ADD
SPD_A
A
A
A
D
D D
D
D
D
D
D D
D
D
DD
DD
D
D
D
D D
D
D
D
A
A
A
D
D
D D
D D
D
D
D
D
D D
A
A
A
A
A
A
A
A
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
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