Troubleshooting Guide For Unit Operation - Econar GeoSurce Vara 2 Plus GV Series Lnstallation And Operating Lnstructions

XIV.
TROUBLESHOOTING GUIDE FOR UNIT OPERATION
B
lown
Fuse/Tripped
Circuit
Breaker
Replace fuse or
reset
circuit breaker.
(Check
for
correct
size fuse
or circuit breaker.)
Blown
Fuse on
Controller
Replace fuse on
controller.
(Check for
correct
size
fuse.)
Broken or Loose Wires Replace or tighten the wires.
Voltage
Supply
Low
If
voltage
is
below minimum voltage
on data
plate, contact local power
company,
Supply below
196
volts
will
hamper compressor
startup.
Low Voltage Circuit
Check transformer
and
fuse for burnout or voltage
less than 18
volts.
Thermostat
Set
thermostat on
"Cool"
and
lowest temperature setting, wait for timeout period
and
unit should
run.
Set thermostat on
"Heat"
and highest temperature setting, wait
for
timeout period
and
unit
should
run. If
unit
does
not run
in
both
cases,
the
thermostat
could
be wired
incorrecfly
or
be
faulty.
To prove
faulty or miswired
thermostat,
disconnect thermostat wires
at the
unit
and
jumper
between
and
"G"
terminals
and
unit
should
run.
Replace thermostat
with
correct
heat
pump thermostat
only. A
substitute may not
work properly.
Entire
unit
does
not run
Intemrptible Power Check incoming
supply voltage.
Dkry
Filrer
Check
filter.
Clean or replace
if
found
dirty
Thermostat Improperly
Set
Is
it
below room temperature? Check
the thermostat setting
Defective Thermostat Check thermostat operation. Replace
iffound
defective.
Incorrect
Wiring
Check
for
broken, loose, or incorrect wires.
Unit
will
not
operate
on
"heating"
Blower Motor
Defective Check blower motor ia
one
of
the other switch
positions.
If it
does not
operate the
compressor
will
go
offon
high
head.
Dirty Air Filter
Check
filter.
Clean or replace
if
found
dirty
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 changed
if dirty
Check
for
closed
registers.
Remove or
add resistance accordingly.
Blower
Speed Set too
Low Verify blower
speed
jumpers
are
in factory
settings.
Low
Air
Temperature
Room temperatures
below
65oF may ice over
the
evaporator
Thermostat Check setting, calibration,
and wiring,
Wirine
Check for
loose
or broken wires
at
compressor, capacitor, or contactor
Blown
Fuse
Replace
fuse or reset
circuit breaker. (Check for
correct
size fuse
or circuit
breaker.)
High or Low
Pressure
Controls The unit
could be
off
on the high or low-pressure cutout
control.
Check water
GPM, air
CFM
and
fllter,
ambient temperature
and loss
of refrigerant.
If
the
unit still fails to run,
check for faulty prglsure conftols individually.
Replace
if
defective.
Voltage
Supply
Low If
voltage
is
below minimum
voltage specified
on the data
plate, contact local power
company. Check voltage
at
compressor for
possible
open terminal.
Low Voltage Circuit
Check transformer
and fuse
for
burn out or voltage
less
that
18
volts. With
a
voltmeter,
check signal from
thermostat at
Y1
to
X, M1
on
controller to
X,
check
for
24 volts
across the
compressor contactor.
Replace component that
does
not
energize.
Compressor Overload Open In all
cases an
"internal"
compressor overload is
used.
If
the
compressor motor is too
hot,
the
overload
will
not reset
until
the
compressor cools down.
Compressor
Motor
Grounded Internal winding grounded to
the compressor shell. Replace
the
compressor.
If
compressor burnout, replace inline filter
drier.
Compressor Windings
Open Check
continuity of
the
compressor windings with
an
ohmmeter.
If
the
windings
are
open, replace the compressor.
Blower
motor
runs but
compressor
does not,
or
compressor
short cycles
Seized Compressor
Try
an
auxiliary
capacitor in
parallel with
the run capacitor momentarily.
If
the
compressor still
does
not
start,
replace it.
Thermostat Improperly
located thermostat (e.g. near kitchen, inaccurately
sensing the
comfort level
in livi4g
areas).
Wiring
and Controls Loose
wiring
connections. or control
contactor defective.
Unit
short
cycles
Compressor Overload
Engaging
Compressor overload works
on
high
temperature. A
compressor running hot
refrigeranl
charge
or faulty high-pressure lockout.
mav
be due
to lack
of
Evaporator
(air coil)
ices
over in
cooling
mode
15
,ROBLEM
POSSISLE CAUSE
C}IECKS AND CORRECTIONS