Mitsubishi City Multi P500YEM-A, Руководство по обслуживанию

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Checking code Meaning, detecting method Cause Checking method & Countermeasure
Discharge
temperature
abnormality
(Outdoor unit) 1102 1. When discharge temperature
exceeds 140
°
C for the first time
during operation, outdoor unit
stops, goes into a restart mode
after 3 minutes, then restarts.
2. When 140
°
C or higher tempera-
ture is detected again (the sec-
ond time) within 30 minutes of
the first incident, emergency
stop is observed with code No.
“1102” being displayed.
3. When 140
°
C or higher tempera-
ture is detected again after at
least 30 minutes have past
since the initial stop of the out-
door unit, resulting stoppage of
the outdoor unit is considered
the initial stop, and the process
shown in 1 is observed.
4. Thirty minutes have past since
the outdoor unit first stopped
and no stop for this reason has
occurred for 30 minutes, the
preliminary fault code “1202”
will be displayed.
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, 3 (BC)
SVM1 (BC)
SVA (BC)
Heating : Indoor LEV
(Heating-only) LEV3 (BC)
SVB (BC)
SV3 ~ 8
See Trouble check of LEV and sole-
noid valve.
1) Gas leak, gas shortage.
2) Overload operations.
3) Poor operations of indoor LEV.
4) Poor operations of BC controller
LEV:
Cooling-only
: LEV3
Cooling-main : LEV1, 3
Heating-only, Heating-main:
LEV3
Defronst : LEV3
5) Poor operations of BC controller
SVM1
:
Cooling-only, defrost
6) Poor operations of BC controller
SVA
:
Cooling-only, Cooling-main
7) Poor operations of BC controller
SVB
:
Heating-only, Heating-main
8) Poor operations of solenoid
valves.
SV (3 ~ 8)
Heating-only, Heating-main
9) Setting error of connection
address (PURY).
10)Poor operations of ball valve.
11) Outdoor unit fan block, motor
trouble, poor operations of fan
controller
→
Heating (Heating-only,
Heating-main).
3) ~ 11) : Rise in discharge
temp. by low pressure drawing.
12)Gas leak between low and high
pressures.
4-way valve trouble, compres-
sor trouble, solenoid valve
SV1 trouble.
13)Poor operations of solenoid valve
SV4a.
Bypass valve SV2 can not
control rise in discharge temp.
14)Thermistor trouble.
15)Thermistor input circuit trouble on
control circuit board.
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.