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Figure 3-13.
switch (S3) contacts will open, causing relay
(K4) to open and the fan speed will return to
L0-SPEED.
(2) Testing.
(u) With power off, check for continuity
between A2 and A3, B2 and B3, and D2 and D3 of
armature relay (K4). Then check for continuity
between C2 and C3 and D2 and D3 of armature
relay (K5). If continuity is not indicated, arma-
ture relay is defective and must be replaced. If
both armature relays indicate proper continuity,
proceed to next test.
(b) Apply 208 volts, 60 Hertz, 3-phase ac
power to air conditioner.
(c) place rotary switch (S1) in VENT
position and two-speed switch (S8) in HIGH.
(d) Check voltage between terminals X2
of armature relay (K4) and ground (El), and
terminal X2 of armature relay (K5) and ground
(El). 30 (±3) vdc should be indicated, or relay
3-18
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