Toshiba Super MMU-AP0092H Service Manual page 103

Check code
Main
Outdoor 7-segment display
remote
controller Check code Auxiliary code
P13 P13 —
P15 P15 01: TS condition
02: TD condition
P17 P17 —
P19
P19 Detected outdoor unit No.
P20 P20 —
Detected
Check code name Status
position
I/F Outdoor liquid back All stop
detection error
I/F Gas leak detection All stop
(TS1 condition)
I/F All stop
Gas leak detection
(TD condition)
I/F All stop
Discharge temp
TD2 error
I/F All stop
4-way valve
operation error
I/F High-pressure All stop
protective
operation
Error detection condition
<In cooling>
While the system operated in cooling mode, high
ststus of high pressure value was detected in the
stopped follower unit.
<In heating>
While the system is operating in HEAT mode,
outdoor PMV of which opening degree was 100
pulse or less for a certain time.
Protective stop which generates when the status
that suction temperature is over the judgment
standard temperature continued for 10 minutes
was repeated for 4 times or more.
<TS error judgment standard temperature>
In cooling operation: 60°C or higher
In heating operation: 40°C or higher
Protective stop which generates when the status
that while compressor is under low frequency
operation, the discharge temperature TD1 or TD2
detected 108°C or more continuously for 10
minutes was repeated for 4 times or more.
Protective stop which generates when the
discharge temperature (TD2) was over 115°C was
repeated for 4 times or more.
When abnormal refrigerating cycle data was
detected in heating
Pd sensor detected 3.6MPa or more.
Check item (position)
• Check full close operation of outdoor PMV (1, 2).
• Check Pd and Ps sensor error.
• Check clogging of SV2 circuit.
• Check clogging of balance pipe.
• Check clogging of SV3B circuit.
• Check outdoor P .C. board (I/F) error.
• Check capillary clogging of oil return circuit from oil separator.
• Check leakage of stop valve in discharge assembly part.
• Check refrigerant shortage.
• Check full open of outdoor service valves (gas side, liquid side).
• Check outdoor PMV clogging (PMV1, 2).
• Check characteristics of TS1 sensor resistance value.
• Check 4-way valve error.
• Check leakage of SV4 circuit.
• Check refrigerant shortage.
• Check outdoor PMV clogging (PMV1, 2).
• Check characteristics of TD1, TD2 sensor resistance value.
• Check indoor air filter clogging.
• Check pipe clogging.
• Check SV4 circuit (Valve leakage, misinstallation)
• Check full opening of outdoor service valves (gas side, liquid side).
• Check clogging of outdoor PMV (PMV1, 2).
• Check characteristics of TD2 sensor resistance value.
• Check 4-way valve error.
• Check leakage of SV4 circuit.
• Check SV4 circuit. (Miscabling and misinstallation of SV41 and SV42)
• Error of 4-way valve error.
• Check coil error and connector connection of 4-way valve.
• Check characteristics of TS1/TE1 sensor resistance value.
• Check characteristics of Pd, Ps pressure sensor output voltage.
• Check misconnection of TE1 and TL sensors.
• Check Pd pressure sensor error.
• Check full opening of service valves (Gas side, Liquid side).
• Check outdoor fan error.
• Check outdoor fan motor error.
• Check clogging of outdoor PMV. (PMV1,2)
• Check clogging of indoor/outdoor heat exchangers.
• Check air short-circuiting in outdoor unit.
• Check clogging of SV2 circuit.
• Check outdoor P .C. board (I/F) error.
• Check indoor fan system error. (Cause of air volume decrease)
• Check valve opening of indoor PMV.
• Check miscabling of communication line between indoor and outdoor.
• Check operation error of stop valve in discharge assembly part.
• Check circuit of gas balance SV4 valve.
• Check circuit of SV5 valve.
• Check refrigerant overcharge.