Figure 2.20 Troubleshooting Motor Start Command; Figure 2.21 Troubleshooting Speed Voltage; Manual 2100-620A - Bard D36A2P/BLD.10304 Installation And Service Instructions Manual

< 1Ω
???VDC
Model Blower Only
D36A/D36L
Same as
D42A/D42L
Free Cooling
D48A/D48L
Mode
D60A/D60L

Manual 2100-620A

Page 66 of 107
FIGURE 2.20
Troubleshooting Motor Start Command
Motor Start Command: With the meter set to Continuity Beeper,
place the black (–) lead on Pin 5 and the red (+) lead on Pin 4 of
the female portion of the Molex-style plug connecting the motor
controller to the back of the wall-mount control cabinet. Meter
should audibly alert a closed-contact condition.
Note the plug-pin "flats" for proper orientation of the plug.
Female Plug
FIGURE 2.21
Troubleshooting Speed Voltage
Speed Voltage: With the meter set to VDC, place the black (–) lead
on Pin 5 and the red (+) lead on Pin 1 of the female portion of the
Molex-style plug connecting the motor controller to the back of the
wall-mount control cabinet. Nominal voltage should be 2.8VDC to
7VDC. Reference Table 2.8 for exact voltage.
Note the plug-pin "flats" for proper orientation of the plug.
Female Plug
TABLE 2.8
Blower Speed Voltage Chart
Free Cooling Mode
Free Cooling Mode
Below 40°F
(CFM/VDC
(CFM/VDC
Speed Voltage)
Speed Voltage)
1800/7.0
Cooling
(CFM/VDC
Speed Voltage)
800/2.8 1100/3.8
950/3.1 1250/4.7
1100/3.8 1600/6.3
1100/3.8 1600/6.3
Electric Heat
1800/7.0