Mitsubishi Electric PUHZ-RP3VHA Technical & Service Manual page 23

wPress the remote controller's CHECK button twice to perform self-diagnosis. See the table below for the
contents of LCD display.
Contents of inferior phenomena
LCD
Abnormality of room temperature thermistor
P1
Abnormality of pipe temperature thermistor/Liquid
P2
Abnormality of drain sensor
P4
Drain overflow protection is working.
P5
Freezing/overheating protection is working.
P6
Abnormality of pipe temperature
P8
Abnormality of pipe temperature thermistor/Cond./Eva
P9
See the table below for details of the LED display (LED 1, 2, 3) on the indoor controller board.
LED1 (microcomputer power supply)
LED2 (remote controller)
LED3 (indoor/outdoor communication)
10-2-2. Test run by outdoor unit SW4
The setting of test run (ON/OFF) and its operation mode (cooling/heating) can be set by SW4 on the controller board of out-
door unit. Check that SW5-1 is set to OFF before performing test run. If SW5-1 is set to ON, turn it OFF and then perform test
run. After finishing test run, set SW5-1 back to ON.
1Set operation mode(cooling or heating) by SW4-2.
2Start test run by setting SW4-1 to ON (
3Finish test run by setting SW4-1 to OFF (
• Operation mode cannot be changed by SW4-2 during test run.
Stop test run to change operation mode by SW4-1, and restart test run by SW4-1 after
the mode is changed.
• Test run automatically stops 2 hours later by 2-hour OFF timer function.
• Test run can be performed by the remote controller.
• The remote controller display of test run by outdoor unit is the same as that of test run by
remote controller.
LCD
U1~UP
F3~F9
E0~E5
E6~EF
----
FFFF
Lits when power is supplied.
Remote controller
The indoor unit should be connected to the outdoor unit with address "0" setting.
Flash when indoor and outdoor unit are communicating.
) with the indicated operation mode of SW4-2.
).
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Contents of inferior phenomena
Malfunction outdoor unit
Malfunction outdoor unit
Remote controller transmitting error
Indoor/outdoor unit communication error
No error history
No applied unit
SW4
C D
ON
A
(Factory setting)
A Stop
B Cooling
C Operation
D Heating
1 2
B