Panasonic Urban Multi MX1R Series Service Manual page 507

Operation Flowcharts
∗ 12 Air flow direction
∗ 13 Hot start
486
∗12
Defrost/Hot start display: OFF
YES
YES
Q
∗14
Option Option
Auxiliary electric heater Auxiliary electric heater
(K1R): OFF (K1R): OFF
Humidifier (Hu): OFF Humidifier (Hu): ON
Fan M1F : LL operation
Electronic expansion valve
Y1E : capacity contorol
Air discharge is 100% horizontal when heating operation is turned off by thermostat.
Hot start is carried out when operation starts or defrosting is complete, and condenser inlet
temperature exceeds 34°C, or 3 minutes elapses, or when Tc > 52°C.
Heating operation
Drain kit (M1P): OFF
NO
Swing flap?
∗12
YES
Swing flap
YES
Defrost operation
in progress?
NO
∗13
YES
Hot start in progress?
NO
Recycling gurad timer
ON (5 minutes)?
NO
Test run in progress?
NO
S
Thermostat status?
R
Option
Auxiliary electric heater
(K1R): ON
Humidifier (Hu): ON
∗15
Low discharge air
temperature protection
NO
Fan M1F : Operating
at set air flow volume
Electronic expansion
valve Y1E
capacity contorol
A
Troubleshooting UM Combination "MA1R Series" Using R-407C
PACD011001C2
Air flow direction setting
Defrost/Hot start display: ON
Option
Auxiliary electric heater
(K1R): OFF
Humidifier (Hu): OFF
YES
Fan M1F : L
Fan M1F : OFF
operation
Electronic expansion
valve Y1E :open
(VF025)