Carrier 40MBAB Installation Instructions Manual page 23

40MBAB: Installation Instructions
SW1
This dip switch group mainly controls and selects the type of unit. It is
suggested that adjustments are only made under the guidance of the
authorized technician.
•SW1-1: Control function, (ON: 24V Thermostat; OFF Auto Detect
or Wired controller, default)
•SW1-2: Use this dip switch to determine whether to stop the fan when
cold air is released; OFF stops the fan, ON does not stop the fan, the
default is OFF
• SW1-3: Select Cooling Only and heat pump functions; ON: cooling
only; OFF: heating and cooling, default
•SW1-4: Control Function, (ON: Control scenario 1; OFF: Auto Detect or
Scenario 2, default)
NOTE: When DIP SWITCH SW1 is set to default, the system
automatically detects the wiring method according to the
three control scenarios. In the event of an unexpected
failure, DIP SWITCH SW1 can be set according to Table 15
on page 22.
SW2
This dip switch group controls compressor compensation or opening form
of the electric auxiliary heat depending on control scenario being used.
• SW2-1 (Control Scenario 2): This dip switch can control compressor
compensation speed when heat pump and electric hear are ON
simultaneously. OFF: Faster compressor speed, default; ON: Slower
compressor speed used for energy conservation
•SW2-1 (Control Scenario 1): This dip switch can control the
temperature difference when the electric heating is turned on. OFF:
4°F(2°C), default; ON: 2°F(1°C), 3-level temperature setting,
consistent with user thermostat setting.
NOTE: When E/AUX controls electric heating, there is no
temperature difference, and it starts directly.
•SW2-2, SW2-3: This two-digit dialing code can control the delayed
start of electrically-assisted heat. When the temperature difference is
too great, the delayed start and the delayed start time can be selected.
SW2-2 1-bit dialing, ON 5°F (2.5°C), OFF without delay
1 bit dialing, OFF 15 minutes, ON 30 minutes, 15 minutes by
default, delayed opening time
•SW2-4: This dial code controls the permissible opening temperature
of electric heating or compressor, OFF allows the opening temperature
of electric heating (using the set temperature of S3 Rotary Switch as
the upper limit temperature of electric heating), and ON the allowable
opening temperature of the compressor (using Rotary Dial S3 as the
upper limit temperature of electric heating). The lower limit
temperature at which the compressor can allow operation.)
S3 Rotary Switch
Ambient temperature controlled by electric heating or compressor, 0
means no temperature protection is turned on, Rotary Dial position 1
through F maps to -4°F (-20°C) through 46°F (8°C). Each rotary dial
point is a 4°F (2°C) change from the previous point.
Example: Set dial point 1 = -20C. Dial point 2 = -18C. ....Dial point F =
8C, and each scale represents 4°F (2°C).
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Fig. 56 —SW3 Settings
SW3
This dip switch group mainly controls compressor compensation or
adjustments to temperature dead-bands depending on control scenario
being used.
•SW3-1: This dialing code can set the continuous operation time for
increasing the set temperature by 1°F-5°F(0.5°C~3°C) before reaching
the temperature. The default is OFF = 90 minutes; ON = 30 minutes.
•SW3-2: This dialing code can set Y/Y2 Y/Y2 compressor speed
adjustment. OFF: Faster compressor speed, default; ON: Slower
compressor speed used for energy conservation
•SW3-3 (Control Scenario 2): This dip switch can control compressor
compensation speed when heat pump and electric hear are ON
simultaneously. OFF: Faster compressor speed, default; ON: Slower
compressor speed used for energy conservation
•SW3-3 (Control Scenario 1): This dialing code can set W2 signal
setting temperature adjustment deviation, ON: 4°F (2°C); OFF: 6°F
(3°C).
•SW3-4: This dip switch enables TURBO fan speed for cooling (ON
for TURBO). This allows for TURBO speed in COOLING mode and
AUTO fan logic. OFF: High speed, default, ON: TURBO speed
SW4 Air Flow Adjustment
This dip switch group works as a combination and enables nominal CFM
adjustments. Only switches 1-3 are enabled. Switch 4 is reserved for
future use. The available settings are: 000/001/010/011, and the air flow is
adjusted according to Table 18:
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