Revision: 01 02/29/2016
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(1) Check electrical components and tighten any loose connections.
(2) Check all wiring and electrical insulators.
(3) Check contactors to ensure proper operation and contact point for wear.
(4) Check that fan motors (if applicable) are operational, ensure fan blades are tight and all
mounting bolts are tight.
(5) Ensure that the condenser surface (if applicable) is cleaned and free of dirt and debris.
(6) Check the operation of the control system. Make certain that all of the safety controls are
operational and functioning properly.
(7) Check chilled water valve system. Make sure that all mechanical joints and flare nuts are
tight.
Service Parts Availability
Genuine replacement service parts should be used whenever possible. Parts may be obtained
by contacting your local sales representative or authorized distributor. Contact us 562.945.8971
TROUBLESHOOTING
GUIDE
Complaint
Problem
Symptom
Action
1.
Chilled water valve is
not opening because of
loose or broken wiring.
Display shows chilled
water cooling is on or
economy cooling is on
but, the valve is closed.
Test for 24VAC at valve
motor. Check continuity
between chilled water
pins connection of the
microprocessor
controller and valve
motor. If no voltage,
replace microprocessor
setting. (refer to
supplied controller
manual-by other)
2.
System does
not humidify
or does not do
so sufficiently.
Control parameters are
not set correctly or set
as expected.
System seems to
function okay
otherwise.
Refer to controller
setting and check that
all control parameters
are set correctly.
Loose or broken wiring
in low voltage circuits or
bad microprocessor
board.
Display shows
humidification
operating but, the
humidifier is not on.
Test for 24VAC at pin
connetion on controller.
If no voltage, check
wiring back to system.
3.
System is on
but, no-thing
is operating.
The blower is
off.
No air flow, fire stat,
water on floor or smoke
detector alarm is
activated.
The display shows one
or more of these alarms
and the Alarm LED is on.
The system is
automatic-ally shut
down if any of these
conditions occur.
Determine what the
