Mitsubishi Electric City Multi CMB-P1016NU-G, Service Handbook

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[
IX
Troubleshooting ]
-4- Check Valve Block
By turning on or off SV4a-4d and SV7a-7c on and off, the refrigerant flows through , , , and . Check the LED monitor.
Valve plug A, B, and C can be removed with 3 kinds of hex wrenches.
(1) PQHY
Check valve block Check valve block
6
Check Valves Block 1Y
BV2
ST1 BV1
CV8a
CV10a CV9a
CV4a
CV3a
CV6a
CV7a
TH6
SV4b
SV4c
SV4d
ST14 ST15 ST16
Solenoid Valves Block 1
SV7b
CV11
SV7a
TH7 ST2
LEV1
ST8
TH5
TH8
TH9
SV4a
10HP
only
Orifice
Water
circulating
Water heat exchanger
(Double coil type)
Refrigerant flow in the case
of cooling
Refrigerant flow in the case
of heating
High-pressure (gas)
High-pressure (liquid)
Low-pressure (gas/liquid)
Refrigerant circuit (PQHY)
1
2
4
5
6
7
8
9
10
1
1
1
1
1
5
1
5
1
6
1
6
1
7
1
7
1
8
1
8
1
9 1
9
1
10
1
10
1
4
1
4
1
2
1
2
Hex wrench
10
5
1
9 8 7 6
5
4 2
1
Valve plug
Gasket
Gasket
C
B
A
Check valve block