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8-3. Effect of Connecting PMV Kit without Fully Opening of
Indoor Unit PMV
Effect of miss-installation which PMV of indoor unit was not fully opened (1500 pulse) are as follows.
Following symptom occurred, PMV of indoor unit should be fully opened.
1. Cooling operation
1) Even though command of PMV is fully open (1500 pulse), actual SH is larger than aim SH.
2) Even though command of PMV is fully open (1500 pulse), cool air does not discharge.
3) Ps is abnormally low, or outdoor unit stops by Ps protection.
2. Heating operation
1) Even though command of PMV is fully open (1500 pulse), actual UC is larger than aim UC.
2) Even though command of PMV is fully open (1500 pulse), hot air does not discharge.
3) Pd is abnormally high, or outdoor unit stops by Pd protection.
8-4. How to Fully Open PMV of Indoor Unit
1. Stop indoor and outdoor units operation and turn off power supply to each units.
2. Remove connection cable of PMV Kit from P.C. board of indoor unit and connect PMV of indoor unit to P.C.
board.
MMK-APXXX2H (High Wall Type) does not use a this conversion cable
3. Turn on power supply of only indoor unit and fully open PMV of indoor unit.
Note : While turn on power supply of indoor unit, outdoor unit also turns on power supply, PMV of indoor unit
can not be fully opened.
4. After 2 minutes from turn on power supply of indoor unit, turn off power supply of indoor unit.
* After this work, PMV of indoor unit is fully opened. While this work, do not order of operation from remote
controller.
5. Remove PMV of indoor unit from P.C. board and connect connection cable of PMV Kit to P.C. board.
6. Treat wires and close electrical parts box of indoor unit.
PMV
PMV Kit
Indoor unit
CN82 connector
Connector conversion cable
Indoor control P.C. board
Connection cable
PMV lead wires
Pulse motor valve (PMV)
(Indoor unit side)
ON
(Over 2 minutes)
Surely OFF