Toshiba MiNi-SMMS MCY-MAP0501HT Service Manual page 122

Check code
Wired Outdoor 7-segment display
remote central control
controller Check code Auxiliary code remote controller
P10 P10 Indoor address
with trouble
P12 — —
The standard ducted unit air conditioner utilizes a direct current (DC) indoor fan motor that features current
limiting protection. In the event power is not isolated prior to service, the protective control circuit will activate
and stop the unit operating. The check code "P12"will be displayed on the remote controller-once service work
has been completed, this code can be cleared by switching off then on the electrical isolation device of the
indoor unit and pressing the operation stop button on the remote controller to reset the system
P13 P13 —
01: TS condition
P15 P15
02: TD condition
P17 P17 —
Detected Check code
AI-NET Status
position name
Ob Indoor Indoor All stop
overflow error
11 Indoor Indoor fan Corresponding
motor error unit only stops.
47 I/F Outdoor liquid All stop
back
detection
error
AE I/F Gas leak All stop
detection
(TS1
condition)
AE I/F Gas leak All stop
detection
(TD condition)
bb I/F Discharge All stop
temp TD2
error
Error detection condition
• Float switch operated. • Check the float switch connector.
• Float switch circuit disconnected or the • Check operation of drain pump unit.
connector came off.
• Check the drain pump circuit.
• Check clogging of drain pipe.
• Check indoor P .C. board error.
• The value of motor speed deviated from • Check connection of fan connector and wiring.
target value was detected for certain time.
• Check fan motor error.
• Over-current protection operated.
• Check indoor P .C. board error.
• Check influence of outside air control.
• Check indoor type code (DN=10) and the capacity code (DN=11).
In heating
• Check full close operation of outdoor PMV
While the system is operating in HEAT mode,
• Check Pd and Ps sensor error.
outdoor PMV of which opening degree was
• Check clogging of SV2 circuit.
100 pulse or less for a certain time.
• Check clogging of 4-way valve error circuit.
• Check outdoor P .C. board (I/F) error.
• Check capillary clogging of oil return circuit from oil separator.
• Check TS sensor error.
• Check refrigerant shortage.
Suction temp exceeded the judgment standard
temp for 10 minutes or more.
• Check full open of outdoor service valves (gas side, liquid side).
• Check outdoor PMV clogging.
TS error judgment standard temperature
• Check characteristics of TS1 sensor resistance value.
In cooling operation: 60°C or higher
• Check 4-way valve error.
In heating operation: 40°C or higher
• Check leakage of SV4 circuit.
• Check leakage of SV5 circuit.
Discharge temperature TD1 or TD2 was • Check refrigerant shortage.
continuously 108°C or higher for 10 minutes.
• Check outdoor PMV clogging.
• Check characteristics of TD1, TD2 sensor resistance value.
• Check indoor air filter clogging.
• Check pipe clogging.
• Check SV circuit (Valve leakage, misinstallation)
• Check mispiping of discharge gas/suction gas main pipe.
Discharge temperature (TD2) exceeded 115°C. • Check full opening of outdoor service valves (gas side, liquid side).
• Check clogging of outdoor PMV.
• Check characteristics of TD2 sensor resistance value.
• Check 4-way valve error.
• Check leakage of SV4 circuit.
• Check SV4 circuit.
• Check leakage of SV5 valve circuit.
• Check mispiping of discharge gas/suction gas main pipe.
Check item (position)