Mitsubishi Electric CITY MULTI PUHY-P200YEM-A Service Handbook page 122

Checking code Meaning, detecting method
1102 Discharge 1. When 110˚C for 8HP and 120°C
temperature
for 10HP or more discharge
abnormality
temper
(Outdoor unit)
operations (the first time), out-
door unit stops once, mode is
changed to restart mode after
3 minutes, then the outdoor unit
restarts.
When 110°C for 8HP and 120
2.
°C for 10HP or higher dis-
charge is detected again (the
second time) within 30 minutes
after the first stop of outdoor
unit, mode is changed to re-
start mode after 3 minutes,
then the outdoor unit restarts.
3. When 110˚C for 8Hp and 120°C
for 10Hp or more discharge
d et e c te d a ga in ( t he t h ir d
time) within 30 minutes after
previous stop of outdoor unit,
emergency stop is observed with
code No. "1102" displayed.
4. When 110˚C for 8Hp and 120°C
for 10Hp or more discharge
detected 30 or more minutes
after previous stop of outdoor
unit, the stop is regarded as the
first time and the process sho wn
in 1 is observed.
5. 30 min
unit is intermittent fault check
period with LED displayed
(1202).
1) Gas leak, gas shortage.
2) Overload operations.
ature is detected during
3) Poor operations of indoor LEV.
4) Poor operations of OC controller
5) Poor operations of BC controller
6) Poor operations of BC controller
.
7) Poor operations of BC controller
is
8) Poor operations of solenoid
is
9) Setting error of connection
10)Poor operations of ball valve.
utes after stop of outdoor
11)Outdoor unit fan block, motor
12)Gas leak between low and high
13)Poor operation of solenoid valve
14)Thermistor trouble. (TH1)
15)Thermistor input circuit trouble on
Cause
LEV:
Cooling : LEV1
LEV:
Cooling-only : LEV3
Cooling-main : LEV1, 3
Heating-only, Heating-main:
LEV3
Defrost : LEV3
SVA :
Cooling-only, Cooling-main
SVB :
Heating-only, Heating-main
valves.
.
SV (3 ~ 6) (PURY)
Heating-only, Heating-main
address (PURY).
trouble, poor operations of fan
controller Heating (Heating-only,
Heating-main).
3) ~ 11) : Rise in discharge
temp. by low pressure drawing.
pressures.
4-way valve trouble, compres-
sor trouble, solenoid valve
SV1 trouble.
SV1.
Bypass valve SV1 can not
control rise in discharge temp.
control circuit board.
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Checking method & Countermeasure
See Refrigerant amount check.
Check operating conditions and opera-
tion status of indoor/outdoor units.
Check operation status by actually
performing cooling or heating opera-
tions.
Cooling : Indoor LEV
(Cooling-only) LEV1 (PUHY)
LEV1, 3 (BC)
SVA (BC)
Heating : Indoor LEV
(Heating-only) LEV3 (BC)
SVB (BC)
SV3 ~ 6 (PURY)
See Trouble check of LEV and sole-
noid valve.
Check address setting of indoor unit
connection.
Confirm that ball valve is fully opened.
Check outdoor fan.
See Trouble check of outdoor fan.
Check operation status of cooling-only
or heating-only.
See Trouble check of solenoid
valve.
Check resistance of thermistor.
Check inlet temperature of sensor
with LED monitor.