Dettson COND-09-01, Installation Instructions And Homeowner'S Manual

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b. Conditions for turning off: it will be turned off when
meeting any condition below:
•
Compressor is operating
•
Compressor is turned off and meanwhile
outdoor ambient temp
≥
-2.2°C (28°F);
c. Outdoor ambient temp sensor has malfunction and
electric heater band stops operation.
2. Control of Electric Heater Band of Condenser
a. When
CDEFCCG HIJ. ≤ 1°, (33.8°0)
, electric
heater band of condenser will operate.
b. During defrosting process, electric heater band of
chassis will operate in 3 min after compressor starts
operating. When compressor has operated for 3 min
and
CDEFCCG HIJ ≥ 3°, (37.4°0)
, electric heater
band will stop operating.
c. When
CDEFCCG HIJ. ≥ 3°, (37.4°0)
, electric
heater band of condenser will not operate.
d. When
1°, (33.8°0) < CDEFCCG HIJ. <
3°, (37.4°0),
electric heater band of condenser will
keep its previous status.
When outdoor ambient temp sensor has malfunction, electric heater
band stops operation; once electric heater stops operation, it has to
wait at least 2 minutes before it can be restarted up again.
5.3.2- 18/24K Unit
Interface Board
5.3.2.1 Temperature Parameters
•
Indoor preset temperature (
MGOROE
)
•
Indoor ambient temperature (
HIJ. )
5.3.2.2 Basic functions
Once the compressor is energized, there should be a minimum interval
of 3 minutes between two start-ups. But if the unit is de-energized and
then energized, the compressor can restart within 3 minutes.
1. Cooling mode
Cooling conditions and process
(1) When
HIJ. ≥ MGOROE
, the unit starts cooling operation. In
this case, the compressor and the outdoor fan operate.
(2) When
HIJ. ≤ MGOROE − 3°, (37.4°0),
the compressor and
the outdoor fan stop.
(3) When Tpreset-3°C (37.4°F)<Tamb.<Tpreset, the unit will
maintain its previous running status.
When outdoor unit has malfunction and stops for protection,
indoor unit will keep previous operation status.
2. Heating mode
Heating conditions and process
(1) When
HIJ. ≤ 2°, (3.6°0)
, the unit starts heating
operation. In this case, compressor and outdoor fan operate
simultaneously; the indoor fan operates at cold-air prevention
mode.
(2) When
HIJ. ≥ 5°, (9°0
), the compressor and
outdoor fan stop operation; the indoor fan blows residual
heat.
(3) When
2°, (3.6°0) < HIJ. < 5°, (9°0),
the unit will maintain its previous running status.
Defrosting and oil return
When receiving the signal of defrosting and oil return, indoor fan will
stop operation. During defrosting, oil return and 5 minutes after quit, all
indoor pipe temperature sensors will not be detected.
Blow residual heat
In heating mode, when temperature reaches the set temperature, the
compressor and outdoor fan will stop.
When the unit is in heating mode, and the compressor and indoor fan
are operating. If the unit is turned off, the compressor and outdoor fan
will stop. Indoor unit will operate at low speed for 10 seconds and then
the unit will be turned off.
Outdoor unit
5.3.2.1 Compensation function of input parameters
According to the structure of wall-mounting unit and the comfortability
for operation, when the compressor is at OFF status, indoor ambient
temperature is higher than set temperature under heating mode.
5.3.2.2 Outdoor discharge temperature sensor
For ensuring the safety and reliability of operation, please insert the
outdoor discharge temperature sensor into the corresponding
temperature sensor bushing to make sure that the control system can
detect system discharge temperature accurately. Otherwise, the unit
will stop operation and it displays malfunction of discharge temperature
sensor (discharge temperature sensor has not been inserted well).
5.3.2.3 Cooling mode
Working condition and process for cooling
(1) If compressor is at OFF status, and (
T − (T
.
−
∆T
. Z 5[
)
)
≤
0°C (0°F), the unit operates
in cooling mode;
(2) During cooling operation, if 0°C (0°F)
≤
(
T − (T
.
−
∆T
. Z 5[
)
)<3°C (5.4°F), the unit still
operates in cooling mode;
(3) During cooling operation, if 3°C (5.4°F)
≤
(
T −
(T
.
− ∆T
. Z 5[
)
), the unit stops
operation when reaching the temperature point in cooling.
5.3.2.4 Defrosting control (heating mode)
(1) If it turns to defrosting time and it detects that the defrosting
temperature is satisfied for 3 minutes successively, the unit
turns into defrosting process.
(2) Defrosting-starting: compressor stops operation and restart it
up after 55s delayed.
(3) Defrosting-ending: compressor stops operation and it starts
up after 55s delayed.
(4) When any of below defrosting-ending conditions is satisfied,
the unit will quit from defrosting operation :
•
T
\ \
≥ T
]\ \ ^
for defrosting;
•
Defrosting operation time is reached at
T
_ Z[
.
5.3.2.5 Control of compressor
(1) Frequency of compressor controls the frequency according to
the relation between ambient temperature and set
temperature, and the change speed of ambient temperature.
(2) Under cooling, and heating mode, compressor will be started
up after outdoor fan is started for 5s.
(3) At the OFF status, the operation stops immediately because
of protection and switchover to fan mode.
(4) Under each mode: once the compressor is started up, it can
be stopped only after operation.
(5) Under each mode: once the compressor is stopped, it can be
restarted up only after 3 minutes delayed.