Friedrich WallMaster WS08C10 Service Manual page 37
Thru-the-wall air conditioners and heat pumps
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Also See for WallMaster WS08C10:
- Installation and operation manual (56 pages) ,
- Specifications (6 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
36
P
o
s
s
b i
e l
C
a
u
s
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
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
Defective thermistor
Unit oversized
Chassis seal gasket not sealing or
absent causing unit to short cycle
Restricted coil or dirty fi lter
P
o
s
s
b i
e l
C
a
u
s
Defective indoor ambient air thermistor Replace thermistor or electronic control board
P
o
s
s
b i
e l
C
a
u
s
Evaporator drain pan cracked or
obstructed
Water in compressor area
Obstructed condenser coil
Fan blade/slinger ring improperly
positioned
e
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
e
Adjust louvers for best possible air circulation
O
p
e
a r
e t
n i
"
Advise customer
e
Replace thermistor or electronic control board
See sizing chart.
Check gasket. Reposition or replace as
needed
Clean & advise customer of periodic cleaning
& maintenance needs of entire unit
e
e
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
Possible Solution
Possible Solution
M
o
n
e
y
S
a
v
e
" r
p
o
t i s
o i
n
Possible Solution
Possible Action
Possible Solution
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