Carrier DHMVHA Service Manual page 20

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Index
1. Indoor or Outdoor DC Fan Motor (control chip is in the fan motor)
Power on and when the unit is in standby, measure the voltage of pin1-pin3, pin4-pin3 in the fan motor connector. If the voltage value is not
within the range shown in Table 12 or Table 13, the PCB has malfunctioned and needs to be replaced.
NO.
1
2
3
4
5
6
NO.
1
2
3
4
5
6
2. Outdoor DC Fan Motor (control chip is in the outdoor PCB)
Power on the unit and check if the fan runs normally. If the fan runs normally, the PCB has malfunctioned and needs to be replaced. If the fan
does not run normally, measure the resistance of each of the two pins. If the resistance is not equal to each other, the fan motor has a problem and
needs to be replaced, otherwise the PCB has an issue and needs to be replaced.
3. Indoor AC Fan Motor
Power on the unit and place the unit in FAN mode at the high fan speed. Run for 15 seconds then measure the voltage of pin1 and pin2. If the
voltage value is less than 100V(208~240V power supply) or 50V(115V power supply), the PCB has malfunctioned and needs to be replaced.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Fig. 20 — Indoor DC Fan Motor
Table 12 — DC motor voltage input and output (voltage: 220-240V~)
COLOR
Red
---
Black
White
Yellow
Blue
Table 13 — DC motor voltage input and output (voltage: 115V~)
COLOR
Red
---
Black
White
Yellow
Blue
SIGNAL
Vs/Vm
---
GND
Vcc
Vsp
FG
SIGNAL
Vs/Vm
---
GND
Vcc
Vsp
FG
20
VOLTAGE
192V~380V
---
0V
13.5-16.5V
0~6.5V
13.5-16.5V
VOLTAGE
140V~190V
---
0V
13.5-16.5V
0~6.5V
13.5-16.5V