Fan Mode - York DCPM Technical Manual

Dehumidification Mode
1. Dehumidification Mode Operation
• When T > T + 1.8 °F, cooling and dehumidification
amb preset
mode will be activated. The compressor and the outdoor
fan will operate while the indoor fan runs at low speed.
- 3.6 °F T
• When T
preset
sor remains at its original operation state.
• When T . < T - 3.6°F, the compressor will stop, the
amb preset
outdoor fan will stop after 60 seconds and the indoor fan
will operate at low speed.
2. Protection – Dehumidification Mode
Protection is the same as that under cooling mode section.
Heating Mode
1. Heating Mode Operation
.  T
• When T
amb preset
The four-way valve, the compressor and the outdoor fan
will operate simultaneously. The indoor fan will run at pre-
set speed defined under "cold air prevention".
.  T
• When T + 9°F, the compressor will stop, the
amb preset
outdoor fan will stop after 60 seconds, and the indoor fan
will continue to run at low speed for 60 seconds more.
• When T + 3.6°F<T
preset
maintain its original operating status.
In heating mode, the four-way valve is energized and tempera-
ture can be set within a range of 61 - 86°F. The heating symbol
and preset temperature are displayed on the indoor unit display.
2. Defrost Mode Operation
When the system has been running continuously in heating
mode for more than 45 minutes, or an accumulated heating
time of more than 90 minutes, and one of the following condi-
tions are present, the unit will enter defrost mode after 3 min-
utes.
• T ≥ 41°F, T
outdoor amb. outdoor pipe
• 28.4°F≤T
outdoor amb.
• 23°F≤T <28.4°F, T
outdoor amb.
• 14°F≤T <23°F, T
outdoor amb.
-5.4°F);
door amb
• T <14°F, T
outdoor amb. outdoor pipe
5.4°F)
NOTE:
After defrost mode is energized for the first time, T
0°F. After the first time, T
compensation
densing coil temperature T
outdoor pipe
• T >35.6°F, T
outdoor pipe compensation
• T ≤35.6°F, T
outdoor pipe compensation
When in defrost mode the following will occur in the order
described:
a.The indoor fan and compressor stop running
b. The outdoor fan will stop running after 60 seconds.
c. 30seconds later, the four-way valve will close.
d. After 30 seconds, the compressor's frequency is
increased to defrost frequency.
e. When the compressor has operated in defrost mode for
10 minutes, or T
outdoor pipe
adjust to 46Hz.
f. After 30 seconds, the compressor will stop.
g. After another 30 seconds, the four-way valve will open
Johnson Controls Unitary Products
T
+ 1.8°F, the compres-
amb preset
+ 3.6°F, heating mode is activated.
.<T + 9°F, the unit will
amb preset
≤28.4°F;
≤17.6°F;
outdoor pipe
- T
outdoor pipe compensation
-T ≤ (T
compensation outdoor amb.
compensation
is determined by the con-
of the last defrost cycle.
= 0°F;
= 5.4°F
≥ 50°F, the compressor will
h. After 60 seconds, the compressor and the outdoor unit fan
will start running. The indoor fan will run under preset cold
air prevention conditions. H1 will be displayed on the
indoor unit display. Defrost frequency is 70Hz.
3. Protection – Heating Mode
• Cold air prevention (Hot Heat Pump) - In heating mode,
after the compressor is energized the indoor fan is delayed
under these conditions to prevent discharging cold air:
 When T
indoor amb.
 T ≤104°F, the indoor fan will not run. The indoor fan
tube
will start running at low speed after 2 minutes.
 Within 2 minutes, if T
running at low speed.
 After 1minute of operation at low speed, the indoor fan
will run at preset speed.
 Within 1-minute of low speed operation or 2-minute
non-operation, if T
speed.
 When T
indoor amb.
 T ≤108°F, the indoor fan will run at low speed. After
tube
one minute of operation, the indoor fan will run at pre-
set speed.
 Within
T >104°F, the indoor fan will run at preset speed.
tube
 Total current up and frequency down protection occurs:
 When I
 When I
to increase
 When I
quency
 When I
outdoor fan stops running after 60 seconds.

Fan Mode

In this mode, the indoor fan will run at preset speed. The com-
pressor, the outdoor fan and the four-way valve will not be run-
ning.
≤ (T
out-
1. In fan mode, temperature can be set within a range of 61 -
86°F.
-
AUTO Mode
1. AUTO Mode Operation
= In AUTO mode, the default cooling setpoint temperature T
is 77°F and the default heating setpoint temperature T
68°F. Once activated, the following will occur under these con-
ditions:
• When T
amb.
• When 71.6°F< T
fan icon is displayed on the indoor unit display.
• When T
amb.
• When T
amb.
mode. The preset temperature is 77°F;
• When T
amb.
the outdoor fan stops running after 1 minute, and the indoor
fan continues to run at a preset speed.
• When T
preset
tinues to run normally.
• When T
amb.
• T ≥T
amb. preset
door fan stops running after 1 minute, and the indoor fan
continues to run for about 30 seconds before it stops.
<75°F if:
>104°F, the indoor fan will start
tube
>108°F, the fan will run at present
tube
≥75°F if:
one-minute of low speed
≤16A, compressor frequency can increase
total
≥17A, compressor frequency is not allowed
total
≥18A, the compressor runs at reduced fre-
total
≥20A, the compressor stops running and the
total
≤71.6°F, heating mode is activated.
<78.8°F, fan mode is activated and the
amb.
≥78.8°F, cooling mode is activated.
≥T +1.8°F, the system runs in cooling
preset
≤T -1.8°F, the compressor stops running,
preset
-1.8°F< T < T +1.8°F, the system con-
amb. preset
≤T +3.6°F, heating mode is activated.
preset
+9°F, the compressor stops running, the out-
923180-UTG-A-1112
operation, if
preset
is
preset
29