Mitsubishi Electric PUHY-200YMF-B Service Handbook page 132

Checking code Meaning, detecting method
1102 Discharge 1. When 140˚C or more discharge
temperature temperature is detected during
abnormality operations (the first time), out-
(Outdoor unit) door unit stops once, mode is
changed to restart mode after
3 minutes, then the outdoor unit
restarts.
2. When 140˚C or more temp. is
detected again (the second
time) within 30 minutes after
stop of outdoor unit, emergency
stop is observed with code No.
"1102" displayed.
3. When 140˚C or more temp. is
detected 30 or more minutes
after stop of outdoor unit, the
stop is regarded as the first time
and the process shown in 1 is
observed.
4. 30 minutes after stop of outdoor
unit is intermittent fault check
period with LED displayed
(1202).
Cause
1) Gas leak, gas shortage.
2) Overload operations.
3) Poor operations of indoor LEV.
4) Poor operations of OC controller
LEV:
Cooling : LEV1
5) Poor operations of BC controller
LEV:
Cooling-only : LEV3
Cooling-main : LEV1, 2, 3
Heating-only, Heating-main:
LEV3, 4
Defronst : LEV3
6) Poor operations of BC controller
SVM :
Cooling-only, defrost
7) Poor operations of BC controller
SVA :
Cooling-only, Cooling-main
8) Poor operations of BC controller
SVB :
Heating-only, Heating-main
9) Poor operations of solenoid
valves.
SV (3 ~ 6) (PURY)→
Heating-only, Heating-main
10)Setting error of connection
address (PURY).
11)Poor operations of ball valve.
12)Outdoor unit fan block, motor
trouble, poor operations of fan
controller→Heating (Heating-only,
Heating-main).
3) ~ 12) : Rise in discharge
temp. by low pressure drawing.
13)Gas leak between low and high
pressures.
4-way valve trouble, compres-
sor trouble, solenoid valve
SV1 trouble.
14)Poor operations of solenoid valve
SV2.
Bypass valve SV2 can not
control rise in discharge temp.
15)Thermistor trouble.
16)Thermistor input circuit trouble on
control circuit board.
* There are not LEV2 and LEV4 on CMB-P-V-E.
–130–
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, 2, 3 (BC)
SVM (BC)
SVA (BC)
Heating : Indoor LEV
(Heating-only) LEV3, 4 (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.