H B X Z O N - 0 5 5 0 Z o n e C o n t r o l
V e r s i o n 2 . 0 2
Page 29
IssUe
PossIble CaUses & ResolUTIons
No Power
•
Verify that a 120VAC is present on pins 13-14-15.
Zone output won’t turn on
•
Verify that the appropriate power is connected to pins 11-12.
•
If the LED for that zone is not illuminated ensure a demand is
present at the thermostat. P.I.D algorithm may take up to 5 minutes
to initialize a demand.
•
Ensure the proper demand type on the thermostat is correct on the
THM-0300/0500 (see manual). A fancoil demand will only turn the
zone output on if zone on demand is set to yes (See THM-0300/0500
manual, or page 14.)
•
Check priorities settings
System pump output won’t turn
on
•
Verify wiring
•
A zone demand needs to be made for the system pump to turn on.
•
The system pump output is on each zone control is only associated
with those 4 zones if multiple zone modules are controlling the
same system pump, then the system pump outputs should be wired
in parallel.
•
Check priorities settings
Fancoil outputs won’t turn on
•
Verify wiring
•
Check the demand settings. See THM-0300/0500 manual
•
A zone demand needs to be made for the fancoil output to turn
on.
•
Check priorities settings
Zone lights flashing
•
The ZON-0550 is in Discovery mode or Pairing mode
Demand outputs won’t turn on/
wrong demands turning on
•
Verify wiring
•
Verify wiring when using multiple modules.
•
In zone setup on the THM-0300/0500, make sure you have correctly
set your demand options.
Thermostat won’t power
•
Verify wiring.
•
Check wiring polarity in pins 5-6.
•
Check zone setup options that the damper zones is set correctly
(See THM-0300/0500 manual)
•
THM-0500 thermostat(s) will take up 120 seconds to power up.
Zones modules not pairing
•
Check zone sequence on each module
•
Ensure you are pairing the zones module using the THM 1
thermostat on the zone module.
Zon-0550 TRoUblesHooTInG GUIDe
