Zone(s) Not Calling
Each zone has a Green LED next to the zone relay when it is
calling. The LED being lit shows that the call is being recognized by
the PCMMP3. If a zone is supposed to be calling and the Zone LED
is not on, check for 24VAC across the thermostat terminal C and the
Y, if a Cool call, W if a Heat Call, or G if a Fan call. If there is no
voltage here at the panel the panel is not getting the signal from the
thermostat. The problem is mis-wiring, a broken wire or a problem in
the thermostat. To check the zone on the panel, place jumper from
R to Y to simulate a Cool call, R to W to simulate a Heat call, or R to
G to simulate a Fan call. By jumpering these terminals the zone call
LED will activate.
Zone(s) Will Not Shut Off
If a zone will not stop calling, the Zone LED should still be on.
Depending on the call disconnect the Y, W or G wire from the zone
terminal strip on the panel. The call from that zone will drop out
when the thermostat wire is removed. Check the thermostat wiring
for a mis-wiring or short that keeps the zone calling.
If the thermostat wire is disconnected from the proper terminal on
the zone and the zone LED remains lit, re-boot the panel to see if
the call drops. If the call still stays on, turn power off to the panel for
10 seconds and then turn back on. Once powered is restored and
the thermostat is disconnected the call should drop from the zone. If
not replace panel.
Damper Motor Checkout Procedure
In order to determine the operation of the damper motors, the panel
motor plug can be checked to determine if power is being supplied
from the panel. If there is power at the motor plug, the problem may
be a broken wire or poor connection in the cord or the motor itself.
To check the power to the motor from the damper plug on the panel,
switch your meter to DC Volts. Note the wires on the plug and check
across either Positive and Negative wires. Note that each plug has
two positive leads and two negative leads. Both positive and both
negative leads are wired together. The meter will read either Plus (+)
or Minus (-) 12VDC depending if the damper is to be Open or
Closed respectively.
DAMPER CLOSED
-12VDC
NOT USED
NOT USED
POSITIVE (+)
POSITIVE (+)
NEGATIVE (-)
MOTOR PLUG
VDC
-12VDC
NOT USED
NOT USED
POSITIVE (+)
POSITIVE (+)
NEGATIVE (-)
MOTOR PLUG
-12VDC
-12VDC
NOT USED
NOT USED
POSITIVE (+)
POSITIVE (+)
NEGATIVE (-)
MOTOR PLUG
VDC
When using multiple dampers on a single zone, please note to have
no more than 6 dampers on a single zone. Adding dampers beyond
the recommended number may cause all dampers to be slow to
operate and may not fully cycle between open and closed.
DAMPER OPEN
+12VDC
NOT USED
NOT USED
POSITIVE (+)
POSITIVE (+)
NEGATIVE (-)
MOTOR PLUG
VDC
+12VDC
NOT USED
NOT USED
POSITIVE (+)
POSITIVE (+)
NEGATIVE (-)
MOTOR PLUG
+12VDC
+12VDC
NOT USED
NOT USED
POSITIVE (+)
POSITIVE (+)
NEGATIVE (-)
MOTOR PLUG
VDC
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