65
1505
Vacuum operation protection
PUMY-125VMA PUMY-125VMA
1
When the suction pressure saturation
temperature thermistor (TH2) detects -13
;
or less and ''[indoor temperature-liquid pipe
temperature]
[
8deg'' for 3minutes
continuously, the 1st COOL operation
(compressor operation) after power supply
on, it stops abnormally. In this time, <1505>
is displayed
1) Ball valve performance failure (not
full opened.)
Check the ball valve is full opened.
2) Light-loaded operation (When outer
temperature is low, the operation is
liable to change to this mode.)
Check the indoor/outdoor unit
operating condition and status.
3) Low-pressure over suction by
refrigerant shortage
Check the refrigerant amount.
4) Pipe clogging and broken
5) Indoor linear expansion valve
performance defective
Repair the defective points.
Perform cool or heat operation to
check the condition.
2502
Drain pump abnormality
When either of the undermentioned
condition is satisfied (when determined
drain sensor goes under water) while the
indoor unit operation (excluding the case of
abnormal stop) and after 3minutes since the
drain pump has operated, the indoor unit
stops abnormally (however fan continues
the normal control). In this time, <2502> is
displayed.
1) Drain pump trouble
Check the drain pump.
Performance
· Turn on the side heater of drain sensor,
then when temperature up from the
detected temperature before turning on is
below 20
;
during 40 seconds.
2) Drain defective
Please confirm whether water can be
drained.
· The detected temperature is below 63
;
after 40seconds since the side heater of
drain sensor has turned on.
· Drain pump clogging
· Drain pipe clogging
3) Open circuit of drain sensor side
heater
Confirm the resistance of the drain
sensor side heater. (approx. 82
'
at
normal between connector CN50 1
and 3 in the indoor controller board)
Check the connector contact failure.
4) Contact failure of drain sensor
connector
Check the drain sensor lead- wire
mounted.
5) Dew condensation on drain sensor
Check the filter clogging
· Drain water descends along lead wire.
· Drain water waving due to filter
clogging.
6) Indoor controller board defective
If the above mentioned checkpoints
has any problem, replace the indoor
controller board.
· Drain pump drive circuit failure
· Drain heater output circuit failure
7) Both of above mentioned 1)~6) and
the indoor linear expansion valve full-
closed failure (leakage) happens
synchronistically.
Check whether the indoor linear
expansion valve leaks or not.
When condition which the outdoor unit is
stopped forcibly consists, or the drain
sensor detects continuously to go under
water 5 times, and also detects ''[liquid pipe
temperature-suction temperature]
[
-10deg''
for 30minutes continuously, the indoor unit
stops abnormally (however, fan operates by
normal control) that indoor unit and
excluding [Fan mode or OFF] in same
refrigerant system. Also, the outdoor unit
which is connected to that indoor unit with
refrigerant system stops abnormality
(compressor is inhibited to operation). In
this time, <2502> is displayed.
1
2
1
2
PUMY-71VM PUMY-125VM PUMY-125YM
PUMY-71VM
1
PUMY-125VM
1
PUMY-125YM
1
PUMY-71VM
2
PUMY-125VM
2
PUMY-125YMA
When the suction pressure saturation
temperature thermistor(TH2) detects -20
;
or
less for 4 consecutive minutes or more during
the 1st COOL operation (compressor
operation) after power supply on, it stops
abnormally. In this time, <1505> is displayed
Display
Meaning and detecting method
Causes
Check points
OC183E--3.qxp 10.5.6 3:05 PM Page 65
