Dettson COND-30-01, Инструкция по установке и руководство пользователя

Страница: 14 / 53

14
operating symbol, the heating symbol and pre-set temperature are
revealed on the display.
Condition and process of defrost
When duration of successive heating operation is more than 45 minutes,
or accumulated heating time more than 90 minutes, and one of the
following conditions is reached, the unit will enter the defrost mode after 3
minutes.
(1)
𝑇 𝑜𝑢𝑡𝑑𝑜𝑜𝑟 𝑎𝑚𝑏. ≥ 5°𝐶 (41°𝐹
),
𝑇𝑜𝑢𝑡𝑑𝑜𝑜𝑟 𝑝𝑖𝑝𝑒 ≤ −2°𝐶 (28.4°𝐹
);
(2) -
2°𝐶 (28.4°𝐹) ≤ 𝑇𝑜𝑢𝑡𝑑𝑜𝑜𝑟 𝑎𝑚𝑏
.;
(3)
−5°𝐶 (23°𝐹) ≤ 𝑇𝑜𝑢𝑡𝑑𝑜𝑜𝑟 𝑎𝑚𝑏. < −2°𝐶 (28.4°𝐹)
,
𝑇𝑜𝑢𝑡𝑑𝑜𝑜𝑟 𝑝𝑖𝑝𝑒 ≤ −8°𝐶 (17.4°𝐹
);
(4) −10°𝐶 (14°𝐹) ≤ 𝑇𝑜𝑢𝑡𝑑𝑜𝑜𝑟 𝑎𝑚𝑏. < −5°𝐶 (23°𝐹) ,
𝑇𝑜𝑢𝑡𝑑𝑜𝑜𝑟 𝑝𝑖𝑝𝑒 − 𝑇𝑐𝑜𝑚𝑝𝑒𝑛𝑠𝑎𝑡𝑖𝑜𝑛 ≤
(𝑇𝑜𝑢𝑡𝑑𝑜𝑜𝑟𝑎𝑚𝑏. −14.8°𝐶 (5.4°𝐹);
(5)
𝑇𝑜𝑢𝑡𝑑𝑜𝑜𝑟 𝑎𝑚𝑏. < −10°𝐶 (14°𝐹
),
𝑇𝑜𝑢𝑡𝑑𝑜𝑜𝑟 𝑝𝑖𝑝𝑒 −
𝑇𝑐𝑜𝑚𝑝𝑒𝑛𝑠𝑎𝑡𝑖𝑜𝑛 ≤ (𝑇𝑜𝑢𝑡𝑑𝑜𝑜𝑟 𝑎𝑚𝑏. −14.8°𝐶 (5.4°𝐹)
.
After energization, when defrosting for the first time 𝑇𝑐𝑜𝑚𝑝𝑒𝑛𝑠𝑎𝑡𝑖𝑜𝑛 =
−17.8°𝐶 (0℉).
If it is not the first time for defrosting,
𝑇𝑐𝑜𝑚𝑝𝑒𝑛𝑠𝑎𝑡𝑖𝑜𝑛
is
determined by
𝑇𝑜𝑢𝑡𝑑𝑜𝑜𝑟 𝑝𝑖𝑝𝑒
of last time quitting defrosting.
(1) 𝑇𝑜𝑢𝑡𝑑𝑜𝑜𝑟𝑝𝑖𝑝𝑒
＞
2°𝐶 (35.6℉) , 𝑇𝑐𝑜𝑚𝑝𝑒𝑛𝑠𝑎𝑡𝑖𝑜𝑛 = −17.8°𝐶 (0℉);
(2)
𝑇𝑜𝑢𝑡𝑑𝑜𝑜𝑟 𝑝𝑖𝑝𝑒 ≤ 2°𝐶 (35.6℉)
,
𝑇𝑐𝑜𝑚𝑝𝑒𝑛𝑠𝑎𝑡𝑖𝑜𝑛 =
−14.8°𝐶 (5.4℉)
At that time, the indoor fan stops and the compressor stops, and after 60
seconds the outer fan will stop, and then after 30seconds, the four-way
valve will stop. After 30 seconds, the compressor is initiated for raising the
frequency to defrost frequency. When the compressor has operated under
defrost mode for 10 minutes, or
𝑇𝑜𝑢𝑡𝑒𝑟 𝑡𝑢𝑏𝑒 ≥ 10°𝐶 (50℉) , the
compressor will be converted to 46Hz operation. After 30 seconds, the
compressor will stop. And after another 30 seconds, the four-way valve will
be opened, and after 60 seconds, the compressor and the outer fan will be
started, the indoor fan will run under pre-set cold air prevention conditions,
and H1 will be displayed at temperature display area on the display panel.
Defrost frequency is 70Hz.

Total current up and frequency down protection
(1) When total current
I
total
≤16A, increasing frequency is allowed;
(2) When total current
I
total
≥17A, increasing frequency is prohibited;
(3) When total current
I
total
≥18A, the compressor will run at reduced
frequency;
(4) When total current
I
total
≥20A, the compressor will stop and the
outdoor fan will stop with a delay of 60s.
3. Common Protection Functions and Fault display under
COOL and HEAT Modes
Overload protection
𝑇 𝑡𝑢𝑏𝑒
: measured temperature of outdoor heat exchanger under cooling
mode; and measured temperature of indoor heat exchanger under heating
mode.
(1) Cooling overload
a. If
𝑇 𝑡𝑢𝑏𝑒𝑠 ≤ 52.2°𝐶 (126°𝐹),
the unit will return to its
original state.
b. If
𝑇 𝑡𝑢𝑏𝑒𝑠 ≥ 55°𝐶 (131°𝐹)
, frequency rise is not
allowed.
c. If
𝑇 𝑡𝑢𝑏𝑒𝑠 ≥ 57.8°𝐶 (136°𝐹
), the compressor will run at
reduced frequency.
d. If 𝑇 𝑡𝑢𝑏𝑒 ≥ 62.2°𝐶 (144°𝐹) , the compressor will stop
and the indoor fan will run at pre-set speed.
(2) Heating overload
a. If
𝑇 𝑡𝑢𝑏𝑒𝑠 ≤ 52.2°𝐶 (126°𝐹),
the unit will return to n its
original operation sate.
b. If
𝑇 𝑡𝑢𝑏𝑒𝑠 ≥ 55°𝐶 (131°𝐹)
, frequency rise is not
allowed.
c. If
𝑇 𝑡𝑢𝑏𝑒𝑠 ≥ 57.8°𝐶 (136°𝐹)
, the compressor will run at
reduced frequency.
d. If
𝑇 𝑡𝑢𝑏𝑒𝑠 ≥ 62.2°𝐶 (144°𝐹)
, the compressor will stop
and the indoor fan will blow residual heat and then
stop.
Exhaust temperature protection of compressor
(3) If
exhaust temperature ≥97.8°C (208°F), frequency is not allowed
to rise.
(4) If e
xhaust temperature ≥102.8°C (217°F), the compressor will
run at reduced frequency.
(5)
If exhaust temperature ≥110°C (230°F), the compressor will stop.
(6)
If exhaust temperature ≤90°C (194°F) and the compressor has
stayed at stop for at least 3 minutes, the compressor will resume
its operation.
Communication fault
If the unit fails to receive correct signals for durative 3 minutes,
communication fault can be justified and the whole system will stop.
Module protection
Under module protection mode, the compressor will stop. When the
compressor remains at stop for at least 3 minutes, the compressor will
resume its operation. If module protection occurs six times in succession,
the compressor will not be started again.
Overload protection
If temperature sensed by the overload sensor is over 115°C (239°F), the
compressor will stop and the outdoor fan will stop with a time lag of 30
seconds. If temperature is below 95°C (203°F), the overload protection will
be relieved.
DC bus voltage protection
If voltage on the DC bus is below 150V or over 420V, the compressor will
stop and the outdoor fan will stop with a time lag of 30 seconds. When
voltage on the DC bus returns to its normal value and the compressor has
stayed at stop for at least 3 minutes, the compressor will resume its
operation.
Designation of
sensors
Faults
Outdoor ambient
temperature The sensor is detected to be open-circuited
or short-circuited for successive 30
seconds.
Outdoor tube
temperature
The sensor is detected to be open-circuited
or short-circuited for successive 30
seconds, and no detection is performed
within 10 minutes after defrost begins.
Exhaust
After the compressor has operated for 3
minutes, the sensor is detected to be open-
circuited or short circuited for successive
30 seconds.
Overload
After the compressor has operated for 3
minutes, the sensor is detected to be open-
circuited or short-circuited for successive
30 seconds.