Carrier 40MBFAQ Service Manual page 9

40MBFAQ: Service Manual
Evaporator Coil Temperature Protection
T2
TEstop
TEdown
TEH2
Fig. 15 — Evaporator Coil Temperature Protection
NOTE:
• Off − Compressor stops
• Decrease − Decrease running frequency to lower level
• Hold − Maintain the current frequency
• Resume − No frequency limit
When the evaporator temperature is higher than the setting protection
value, the compressor stops.
Auto-Mode
This mode can be chosen with the remote control and the setting
temperature can be changed between 62
In AUTO mode, the unit chooses the COOLING, HEATING or FAN-
ONLY mode according to DT (DT =T1.Ts).
Table 3 — Auto Mode
ΔT=T1-Ts
°F (2°C)
ΔT＞4
° °C (4°F)
- 4 (-2 C) ≤ΔT≤2
°C (4°F)
ΔT<-2
The indoor fan runs under AUTO fan in the relevant mode. The louver
operates the same as in the relevant mode. If the unit switches between the
HEATING and COOLING modes, the compressor stops for 15 minutes
and then chooses the mode according to T1−Ts. If the setting temperature is
modified, the unit chooses the running function again.
DRYING Mode
Indoor Fan Speed is Fixed
Indoor fan speed is fixed at breeze and can not be changed. The louver
angle is the same as in the COOLING mode.
Low Indoor Room Temperature Protection
In the DRYING mode, if the room temperature is lower than 50°F (10°C),
the compressor stops and will not resume until the room temperature
exceeds 53.6°F (12°C).
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Decrease
Hold
Resume
A220988
F (17 C)~86 F (30 C).
° ° ° °
Running Mode
Cooling
Fan-Only
Heating
Timer Function
Timing range is 24 hours
• TIMER ON: The unit turns on automatically when reaching the
setting time.
• TIME OFF: The unit turns off automatically when reaching the
setting time.
• TIMER ON/OFF: The unit turns on automatically when reaching the
setting "on" time, and then turns off automatically when reaching the
setting "off" time.
• TIMER OFF/ON: The unit turns off automatically when reaching the
setting "off" time, and then turns on automatically when reaching the
setting "on" time.
The timer function will not change the unit's current operation mode.
Suppose the unit is off now; it will not start up first after setting the
TIMER OFF function. When the setting time is reached, the timer LED
turns off and the unit's running mode is the same. The setting time is
relative time. The unit exits the timer function if it experiences a
malfunction.
Sleep Function
The SLEEP function is available in the COOLING, HEATING or
AUTO mode.
The Operation process in the SLEEP mode is as follows:
• When cooling, the setpoint rises 2
(30 C) every one hour. Two (2) hours later, the room temperature
°
stops rising and the indoor fan remains at a low speed.
• When heating, setpoint decreases 2°F (1°C) (to a minimum of 62°F
(17°C) every one hour. Two (2) hours later, the setpoint stops
decreasing and the indoor fan is set at the low speed.
(Anti−Cold wind function has the priority).
Operation time in the SLEEP mode is seven (7) hours. After seven (7)
hours, the unit exits the SLEEP mode and powers off.
FORCED OPERATION Function
When the unit is off, press TOUCH to engage the FORCED AUTO
mode. Press TOUCH again within five seconds to engage the FORCED
COOLING mode. In the FORCED AUTO, FORCED COOLING or
any other operation mode, press TOUCH to turn off the unit.
FORCED OPERATION Mode
In the FORCED OPERATION mode, all the general protections and
remote control are available.
Operation Rules
FORCED COOLING Mode
The compressor runs at the F2 frequency and the indoor fan runs in the
BREEZE mode. After running for 30 minutes. the machine enters
AUTO mode at the 75.2°F (24°C) setting temperature.
FORCED AUTO Mode:
The FORCED AUTO mode is the same as the normal AUTO mode with
a 75.2°F (24°C) setting temperature.
9
F (1 C) (to a maximum of 86
° °
F
°