Mitsubishi Electric PUHY-200YMF-B Service Handbook page 135

Checking code Meaning, detecting method
1302 High pressure When press. sensor detects 1kg/
2
abnoramlity 2 cm G (0.098MPa) or less just be-
(Outdoor unit) fore starting of operation, erro stop
is observed with code No. "1302"
displayed.
1368 Liquid When liquid side press, sensor, gas
side side pressure sensor, or interme-
diate pressure sensor detects
30kg/cm
ror stop is observed with code No.
"1368", or "1370" displayed.
1370 Intermedi-
ate side
1) Fall in internal press. caused by
2) Press. sensor trouble.
3) Film breakage.
4) Coming off of pin in connector por-
5) Broken wire.
6) Press. sensor input circuit trouble
1) Poor operations of indoor LEV.
2) Poor operations of BC controller
2 G (2.94MPa) or more, er-
3) Poor operations of BC controller
4) Poor operations of BC controller
5) Poor operations of BC controller
6) Solenoid valve SV (3 ~ 6) trouble.
7) Setting error of connection address.
8) Poor operations of ball valve.
9) Short cycle of indoor unit.
10)Clogging of indoor unit filter.
11)Fall in air volume caused by dust
12)Dust on indoor unit heat exchanger.
13)Indoor unit fan block, motor trouble.
14)Short cycle of outdoor unit.
15)Dust on outdoor unit heat ex-
16) Outdoor unit fan block, motor trou-
17)Poor operations of solenoid valves
18)Thermistor trouble (TH2, TH5, TH6).
19)Pressure sensor trouble.
20)Control circuit board thermistor
21)Poor mounting of thermistor.
Cause
gas leak.
tion, poor contact.
on control circuit board.
LEV:
Heating-only, heating-principal:
LEV3, 4
Defrost: LEV3
SVM:
Cooling-only, defrost
SVA:
Cooling-only, cooling-principal
SVB:
Heating-only, heating-principal
Cooling-only, cooling-principal
on indoor unit fan.
9)~13) : Rise in high pressure
caused by lowered condensing
capacity in heating-only and
heating-principal operation.
changer.
ble, poor operations of fan control-
ler.
14)~16) : Rise in high press.
caused by lowered condensing
capacity in cooling-only and
cooling-principal operation.
SV1, 2.
(Bypass valves (SV1, 2) can not
control rise in high pressure.)
trouble, press. sensor input circuit
trouble.
(TH2, TH5, H6)
* There are not LEV2 and LEV4 on CMB-P-V-E.
–133–
Checking method & Countermeasure
See Trouble check of pressure sen-
sor.
Check operations status by actually
performing cooling or heating opera-
tions.
Cooling : Indoor LEV
LEV1, 2, 3
SVM
SVA SV3~6
Heating : Indoor LEV
LEV3, 4
SVB
See Trouble check of LEV and sole-
noid valve.
Check address setting of indoor unit
connector.
Confirm that ball valve is fully opened.
Check indoor unit and take measures
to trouble.
Check outdoor unit and take measures
to trouble.
Check outdoor unit fan.
See Trouble check of outdoor unit
fan.
See Trouble check of solenoid
valve.
Check resistance of thermistor.
Check Trouble check of pressure
sensor.
Check inlet temperature and press. of
sensor with LED monitor.