N Troubleshooting Guide For Unit Operations - Econar GeoSource Ultra GW Series Installation And Operating Instructions Manual

XV.
TROUBLESHOOTING GUIDE FOR UNIT OPERATION
Blown
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
1oca1
power company.
Low Voltage Circuit
Check
24-volt transformer for
burnout,
blown fuse or voltage
less
than
I
8
volts
Remote Hydronic Control or
RoomThermostat
Set
system
to
"Coo1"
and
lowest temperature setting, unit should run.
Set
system
to
"Heat"
and
highest temperature setting, unit should run.
If
unit
does
not run
in
either
case, the
hydronic control (or room thermostat) could be faulty or
incorrectJy wired.
To
prove faulty
or
miswired, disconnect ttrermostat wires
at the
unit
and
jumper
between
'R',
.Y'
and
"G" terminals,
and
unit
should run.
Only
replace
with
correct replacement.
A
substitute may
not work properly.
Entire unit
does
not
run.
Intemrptible
Power Check
incoming
supply voltage.
Water Lack of sufflcient
pressure, flow,
temperature and/or
quantity of
water.
Unit
Undersized Recalculate heat gains or
losses
for
space
to be conditioned.
lf
excessive,
rectify
by
adding
insulation,
shading, etc.
Loss of
Conditioned Air by
Leaks Check
for
leak
in ductwork
or
introduction of
ambient air tbrough doors
and
windows.
Improperly located thermostat (e.g. near kitchen sensing inaccurately the comfort
level in living
areas).
Check anticipator
settinq (Should
be
1.0
or
1.2).
Thermostat
Airflow
(Across fan
coil)
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
difi.
Remove or
add
resistance accordingly.
Refrigerant Charge
Low
on
refrigerant
charge causing
inefficient
operation.
Adjust only after
checking
CFM, GPM
and
inlet/outlet
temperatures.
Compressor
Check for defective compressor.
If
discharge pressure is too
low
and suction
pressure too high,
compressor
is
not
pumping properly.
Replace compressor.
Reversing Valve
Defective
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.
Insufftcient cooling or
heating
Desuperheater The
desuperheater
circuit
(in-line
fuse) should be disconnected
during cold
weather
to allow fuIl
heating load to house.
Remote Hydronic Control or
Room Thermostat
Check setting
and
wiring. If
thermostat
has an
anticipator,
set
it
at
1.0
or
1
.2.
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
Pressure
or Low
Pressure
Switch or Discharge Refrigerant
Temperature
Switch
The unit could be
off
on high pressure, low-pressure or discharge refrigerant
temperature cutout. Check water
GPM and temperatures, ambient temperature and
loss
of refrigerant. If unit still
fails to run, individually check
for faulty
switches or
wiring.
Replace
if
defective.
Defective
Capacitor
Check capacitor,
if
defective remove, replace,
and
rewire correctly
Voltage
Supply
Low If
voltage is below minimum voltage specified on the
data p1ate,
contact local
power company. Check voltage
at compressor
for possible
open
terminal.
Low
Voltage
Circuit
Check 24-volt transformer for burn
out
or
voltage less
that
18 volts.
With
a
voltmeter,
check signal
fiom
thermostat
at
Y
to
X,
Ml
on
controller
to
X,
capacitor voltage drop. Replace component that
does
not energize.
Compressor Overload Open
In
all
cases an "intemal" compressor overload is used.
If
the compressor
motor
is
too hot, the overload
will
not
reset
until
the compressor cools down.
If
the
compressor is
cool
and the overload
does
not reset, there may be
a
defective
or
open overload. Replace the compressor.
Compressor
Motor
Shorted
to
Ground
Internal winding grounded to
the
compressor shell. Replace the compressor.
If
compressor burnout replace
the
liquid line filter/drier.
Compressor
Windings
Open Check
continuity of
the compressor
windings with
an
ohmmeter.
If
the windings
are open, replace
the
compressor.
Hydronic pump 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.
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