Econar GeoSource Vara GV Series Installation And Operating Instructions Manual page 16

Thermostat
Wiring
Blown
Fuse
The unit could
be
off
on
the
high or low-pressure cutout
control. Check water GPM,
CFM
and
filter,
ambient temperature and
loss
of refrigerant.
If
the
unit
still
fails to run,
arr
if
defective. controls
check
for
High
or
Low
Pressure
Controls
If
voltage is below minimum
voltage specified on
the data
plate, contact
local power
Check
terminal.
at
for
Voltage
Supply
Low
Check
transfofiner
and
fuse
for burn out or voltage less
that
18
volts. With
a
voltmeter,
check signal
from
thermostat at
Y
to
X,
Ml
on
controller to
X,
check
for
24 volts across the
compressor
contactor. Replace component that does
not
energize.
Low Voltage
Circuit
Compressor Overload Open
ln
all
cases an
"internal"
compressor overload is
used. If
the
compressor motor is too
the overload
will
not reset
until
the
cqmpfgllgllqqlq
down.
hot,
lnternal winding grounded to the compressor shell. Replace the compressor,
burnout, replace
inline
filter
drier.
If
compressor
Compressor
Motor Grounded
Check
continuity of
the compressor
windings with
an
ohmmeter.
If
the
windings
are open,
replace the compressor.
Compressor
Windings
Open
Seized
Compressor
Try
an
auxiliary capacitor
in parallel with the run capacitor
momentarily.
If
the
compressor
still
does
not start, repiace
it.
Blower motor
runs but
compressor
does
not, or
compressor
short cycles
Improperly located thermostat
(e.g. near kitchen,
inaccurately sensing the
comfort level in
living
areas).
Thermostat
Wirine
and
Controls Loose
wiring
connections, or
control
contactor defective,
Compressor overload
works
on
high temperature.
A
compressor
running
hot may
be
due to
lack of refrigerant
charge
or
faulty
high-pressure
lockout.
Unit
short
cycles
Compressor Overload Engaging
Reversing
Valve
does
not Shift Defective solenoid valve
will
not energize. Replace solenoid coil.
Unit
does
not
cool (Heats
Only)
Reversing
Valve
does
not Shift,
the
Valve
is Stuck
The solenoid valve
is de-energized due to
miswiring
at
the unit
or thermostat-correct
wiring.
Replace
if
valve is tight or frozen
and
will
not
move.
Switch from heating to cooling
a
few
times to loosen valve.
Water
Lack of sufficient pressure,
temperature or
quantity of
water
Unit Undersized
Air lraks
in
Ductwork
Check
for leaks in ductwork
or
introduction of
ambient air through doors/windows
Thermostat Improperly
located thermostat (e.g.
near
kitchen,
not
sensing the
comfort tevel in living
areas). Check anticipator setting.
Airflow
Lack of
adequate
airflow
or improper distribution of
air.
Check the
motor
speed and
duct
sizing.
Check the
filter,
it
should be inspected every month and cleaned
if dirty.
Remove or
add resistance accordingly.
Refrigerant Charge Low
on
refrigerant charge causing inefficient operation. Adjust only
after checking
CFM
and
GPM.
Reversing Valve
reversing valve creating
bypass
of
refrigerant from
discharge to suction
side
of
compressor. When it is
necessary to replace
the
reversing valve, wrap it with
a
wet cloth
and
direct
the heat
away.
Excessive
heat can damage
the valve.
Defective
Insufficient
cooling or
heating
Desuperheater
The
crcurt
should disconnected
be
desuperheater
(inJine
fuse)
extreme
weather
cold
during
allow to
fu11
to load
house.
Unit not
kvel
Level vertical units.
Water drips
from unit
Condensate
Drain Line Kinked
or Plugged
Clean
condensate Make drain.
sure external
drain condensate installed
ls
with
adequate drop
and
Compressor
Make
sure the compressor is not in direct
contact with
the base or
sides
of
the cabinet.
or
creates noise.
Blower
and BIower Motor
Blower
wheel
hitting
the casing, adjust
for
clearance
and alignment.
Bent
blower,
check
and
Loose blower
wheel
on check
and
if
Contactors
A
or
m
nolse
the
"clattering"
contactor
be
could
to due
"humming"
control
than less
voltage
8
I Check volts. low
for
low
transformer
or
voltage, supply
tralsformer outPut,
tap setting.
the
If
contactor contacts
are corroded
OI or
coil
IS
or
Rattles
and Vibrations
loose
for
internal
OI
screws, panels,
could
be
the
Copper
components. piping
hitting
metal
surfaces.
Water
and
Airborne
Noises
Noisy
0peration
Cavitating
Pumps
Purge air
from
closed loop
system.
Check
and
Check
for loose or broken wires at
or contactor
fuse or reset
circuit
breaker,
for
correct size
fuse or circuit breaker
Recalculate
heat
gains or
losses
for
space
to
be
conditioned.
If
excessive,
rectify by
adding
etc.
Undersized ductwork
will
cause
high airflow velocities
and noisy operation.
Excessive
water through the water
coil
will
cause a squealing
sound.
Check the water flow
t4
flow for
but
the
noise.
,
ensuring
C{IEICKS AND
CSRR*CTIONS
PROBLTM POSSIBLECAUS$