Heating Mode; Auto Mode; Dry Mode - Carrier 40MPHA Service Manual

HEATING Mode

Compressor Control
1 Reach the configured temperature:
S
If the following conditions are satisfied, the compressor
ceases operation.
S
While the calculated frequency(fb) is less than the
minimum limit frequency(FminC).
S
When the protective time is more than or equal to
ten minutes.
S
When T1 is higher than or equal to
Tsc+HDIFTEMP2.
NOTE: HDIFTEMP2 is the EEPROM setting parameter. It is
_ _
35.6 F (2 C) usually.
S
If one of the following conditions is satisfied, regardless
of time.
S
Compressor running frequency is more than test
frequency.
S
When the compressor running frequency is equal
to the test frequency, T4 is more than 59
no T4 or T4 fault.
S
Change the setting temperature.
S
Turbo or sleep function on or off.
2 When the current is higher than the predefined safe value,
the surge protection is activated, causing the compressor to
cease operations.
Indoor Fan Control
1 In the HEATING mode, the indoor fan operates
continuously. The fan speed can be set to 1%−100%, or
muted.
2 AUTO fan
S
Rise curve
S
When T1−Tsc is higher than 29
speed reduces to 80%;
S
When T1−Tsc is higher than 32
speed reduces to 60%;
S
When T1−Tsc is higher than 33
speed reduces to 40%;
S
When T1−Tsc is higher than 34
speed reduces to 20%.
S
Descent curve
S
When T1−Tsc is lower than or equal to 33
_
(0.5 C), fan speed increases to 20%;
S
When T1−Tsc is lower than or equal to 32
_
(0 C), fan speed increases to 60%;
S
When T1−Tsc is lower than or equal to 29
_
(−1.5 C), fan speed increases to 80%;
S
When T1−Tsc is lower than or equal to 27
_
(−3 C), fan speed increases to 100%.
Outdoor Fan Control
S
The outdoor unit runs at a different fan speed according
to T4 and compressor running frequency.
S
For different outdoor units, the fan speeds differ.
DEFROSTING Mode
Evaporator Temperature Protection
_ _
F (15 C) or

AUTO Mode

_ _
F (−1.5 C), fan
_ _
F (0 C), fan

DRY Mode

In the DRY mode, the air conditioner operates the same as auto fan
_ _
F (0.5 C), fan
in the COOLING mode.
_ _
F (1 C), fan
_
F
_
F
_
F
_
F
12
S
The unit enters defrosting mode according to changes in
the temperature value of T3, T4 as well as the
compressor running time.
S
In defrosting mode, the compressor continues to run, the
indoor and outdoor motor will cease operation, the
defrost light of the indoor unit will turn on, and the
symbol appears.
" "
S
If any one of the following conditions is satisfied,
defrosting ends and the machine switches to the normal
HEATING mode:
S
T3 rises above TCDE1
S
T3 maintained above TCDE2
S
Unit runs for 15 minutes consecutively in the
DEFROSTING mode.
S
Off: Compressor stops.
S
Decrease: Decrease the running frequency to the lower
level per 20 seconds.
S
Hold: Keep the current frequency.
S
Resume: No limitation for frequency.
S
This mode can be selected with the remote controller
and the setting temperature can be changed between
_ _ _ _
61 F~86 F (16 C~30 C).
S
In the AUTO mode, the machine selects the COOLING,
HEATING, AUTO−DRYING or FAN−ONY mode on
the basis of T1,Ts, T4 and relative humidity.
S
If the setting temperature is modified, the machine selects
a new running function.
1 Mute function is active.
S
All protections are activated and operate the same as they
do that in COOLING mode.
2 Low Room Temperature Protection
S
If the room temperature is lower than 10
compressor ceases operations and does not resume until
the room temperature exceeds 12
_
C.
_
C for 80 seconds.
_
C, the
_
C.