Service Manual -
B-VMHxxAV-1
SW2-1
The first group controls the electric
heating to turn on the temperature
difference
1°C(1.8°F)
2°C(3.6°F)
SW2-2
Whether the electric heating is
delayed
Yes
No
SW2-3
Electric auxiliary heating delay start
time
30min
15min
SW2-4
Electric heating/compressor allow
opening limit
Compressor allowed to
operate to low limit set by
ENC 2
Electric heating allowed to
operate to high limit set by
ENC
SW3-1
Continuous running time when the
set temperature of 1°C(1.8°F) is not
reached
E-square value(0.5 hour)
1.5 hours
SW3-2
Cooling and heating Y2 signal setting
temperature adjustment value A
1°C(1.8°F)
2°C(3.6°F)
SW3-3
Hysteresis of the second group of
electric heating
2°C(3.6°F)
3°C(5.4°F)
SW3-4
Reserve
/
/
S4-1
Default ON
Short circuit W1 and W2
W1, W2 separate
S4-2
Default ON
DH is off by default
DH on
SW4-1
000 is the default
000/001/010/011/100/101/110/111, internal machines
with different abilities, electric heating and PSC
classification for use
SW4-2
SW4-3
NOTICE: The SW4 DIP switch is only for Certified service technicians to debug and use, please do not touch it.
Summary of Contents for Comfort-Aire Century A-VMH18SV-1
Page 30: ...Service Manual B VMHxxAV 1 ...
Page 37: ...Service Manual B VMHxxAV 1 Outdoor Unit 3 3 Panel Plate X430 Square grille ...
Page 38: ...Service Manual B VMHxxAV 1 Outdoor Unit 4 4 Panel Plate D30 Square grille ...
Page 39: ...Service Manual B VMHxxAV 1 Outdoor Unit 5 5 2 Service Place Minimim 4 Recommended 12 ...
Page 42: ...Service Manual B VMHxxAV 1 Outdoor Unit 8 8 A VMH18SV 1 A VMH24SV 1 ...
Page 45: ...Service Manual B VMHxxAV 1 ...
Page 103: ...Service Manual B VMHxxAV 1 Troubleshooting 15 ...