Friedrich KUHL R-410A Service Manual page 63
115 & 208-230-volt cool only, 208-230-volt cool with electric heat, 208-230-volt heat pump with electric heat, 115-volt heat pump
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Also See for KUHL R-410A:
- Service manual (47 pages) ,
- Parts manual (16 pages) ,
- Service and parts manual (17 pages)
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COOLING ONLY ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS
P
o r
b
e l
m
Water "spitting"
into room
P
o r
b
e l
m
Excessive
moisture
P
o r
b
e l
m
Unit
short cycles
P
o r
b
e l
m
Prolonged off
cycles
P
o r
b
e l
m
Outside water
leaks
62
P
o
s
s
b i
e l
C
a
u
s
e
Sublimation:
When unconditioned saturated,
outside air mixes with conditioned
air, condensation forms on the
cooler surfaces
Downward pitch of installation is
too steep towards back of unit
Restricted coil or dirty fi lter
P
o
s
s
b i
e l
C
a
u
s
e
Insuffi cient air circulation thru area
to be air conditioned
O
v
e
s r
z i
e
d
u
n
t i
Inadequate vapor barrier in building
structure, particularly fl oors
P
o
s
s
b i
e l
C
a
u
s
e
Defective thermistor
Unit oversized
Chassis seal gasket not sealing or
absent causting unit to short cycle
Restricted coil or dirty fi lter
P
o
s
s
b i
e l
C
a
u
s
e
Defective indoor ambient thermistor
or electronic control board
Defective remote wall t-stat
P
o
s
s
b i
e l
C
a
u
s
e
Evaporator drain pan cracked or
obstructed
Water in compressor area
Obstructed condenser coil
Fan blade/slinger ring improperly
positioned
Possible Solution
Ensure that foam gaskets are installed in
between window panes & in between the
unit & the sleeve. Also, ensure that fresh
air/exhaust vents (on applicable models) are in
the closed position & are in tact
Follow installation instructions to ensure that
downward pitch of installed unit is no less than
1/4" & no more than 3/8"
Clean & advise customer of periodic cleaning
& maintenance needs of entire unit
Possible Solution
Adjust louvers for best possible air circulation
O
p
e
a r
e t
n i
"
M
o
n
e
y
S
a
v
e
" r
Advise customer
Possible Solution
Replace thermistor or electronic control board
See sizing chart. Correct as needed.
Check gasket. Reposition or replace as
needed
Clean & advise customer of periodic cleaning
& maintenance needs of entire unit
Possible Solution
Check alarms. Replace thermistor or electronic
control board
Replace t-stat
Possible Solution
Repair, clean or replace as required
Detach shroud from pan & coil. Clean &
remove old sealer. Reseal, reinstall & check
Use pressure wash or biodegradable cleaning
agent to clean
Adjust fan blade to 1/2" of condenser coil fi n
pack
p
o
t i s
o i
n
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