Mitsubishi Electric PKA-RP1.6GAL Service Technical Manual page 88

Remote Controller Display
Remote controller is displaying "H0", and
operation is not possible.
After power is turned ON, "H0" is displayed
for 3 mins., then error code is displayed.
Display messages do not appear even
when remote controller operation switch is
turned ON (operation lamp does not light
up).
Operation display appears but soon
disappears even when remote controller
operations are executed.
* Press the remote controller`s "CHECK" button twice consecutively to be able to run a self diagnosis. See the chart below for content of
error code displays.
LCD Nonconformity Content
P1 Abnormality of room temperature thermistor (TH1).
P2 Abnormality of pipe temperature thermistor/Liquid (TH2)
P4 Abnormality of drain sensor (DS)
P5 Malfunction of drain-up machine
P6 Freezing/overheating protection is working
P8 Abnormality of pipe temperature
P9 Abnormality of pipe temperature thermistor/Cond./Eva. (TH5)
See the chart below for details of the LED displays (LED 1,2,3) on the indoor substrate.
LED 1 (microcomputer power supply)
LED 2 (remote controller feed)
LED 3 (indoor and outdoor signals)
ON/OFF
7
FAN
MODE VANE
3,4
CHECK LOUVER
TEST RUN
2
SET RESET
Symptoms
OUTDOOR BOARD LED Display
In case of digital display, < > is displayed.
After "startup" is displayed,
only green is lit up.
After "startup" is displayed, the
green(once) and red(once) are
blinked alternately.
After "startup" is displayed, the
green(once) and red(twice) are
blinked alternately.
After "startup" is displayed, the
green(twice) and red(once) are
blinked alternately. <EA,Eb>
After "startup" is displayed,
only green is lit up. < 00 >
After "startup" is displayed,
only green is lit up. < 00 >
Displays the ON/OFF of power for control. Check that this is lit during normal use.
Displays the ON/OFF of feed to wired remote controller. Is only lit for indoor unit linked to outdoor
unit with address "00".
Displays signal between indoor and outdoor units. Check that this is flashing during normal use.
TEST RUN
TEMP
AUTO STOP
5
AUTO START
6
h
min
CLOCK
• After power is turned ON, system startup lasts for about 2
< 00 >
mins., and "H0" is displayed (correct operation).
• Outdoor unit`s safeguard installation connector is open.
• Negative phase and open phase of outdoor unit`s power
<F1>
terminal board (Single phase: L,N
• Incorrect connection of outdoor terminal board (Single phase:
L,N grounding and S1,S2,S3)
<F3,F5,F9>
• Wiring for the indoor and outdoor unit is not connected
correctly. (Polarity is wrong for S1,S2,S3)
• Remote controller transmission wire short
•There is no outdoor unit for address 0 (address is something
other than 0).
• Remote controller transmission wire burnout
• After cancellation of function selection, operation is not
possible for about 30 secs. (correct operation).
LCD
E0~E5 Abnormality of the signal transmission between remote
controller and indoor unit.
E6~EF Abnormality of the signal transmission between indoor unit and
outdoor unit.
U0~UL Abnormality in outdoor unit.
F1~F9 Abnormality in outdoor unit.
No trouble generated in the past.
----
No corresponding unit.
FFFF
Test run [for wireless remote controller]
Measure an impedance between the power supply terminal block on
the outdoor unit and ground with a 500V Megger and check that it is
equal to or greater than 1.0M".
1 Turn on the main power to the unit.
TEST RUN
2 Press the
button twice continuously.
(Start this operation from the status of remote controller display
turned off.)
TEST RUN
A and current operation mode are displayed.
MODE
3 Press the
(
check whether cool air is blown out from the unit.
MODE
4 Press the
(
check whether warm air is blown out from the unit.
FAN
5 Press the
button and check whether strong air is blown out
from the unit.
VANE
6 Press the
button and check whether the auto vane operates
properly.
7 Press the ON/OFF button to stop the test run.
Note:
• Point the remote controller towards the indoor unit receiver
while following steps 2 2 to 7 7 .
• It is not possible to run the in FAN, DRY or AUTO mode.
88
Cause
)
Nonconformity Content
) button to activate mode, then
COOL
) button to activate mode, then
HEAT