Mitsubishi Electric CITY MULTI CMB-P1016V-F, Руководство по обслуживанию

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Solenoid Valve (SV1,3-6 for PURY-P200·250)
Check if the control board’s output signals and the operation of the solenoid valves match.
Setting the self-diagnosis switch (SW1) as shown in the figure below causes the ON signal of each relay to be output to
the LED’s.
Each LED shows whether the relays for the following parts are ON or OFF. When a LED lights up, it indicates that the
relay is ON.
1 2 3 4 5 6 7 8
1) In the case of SV1 (Bypass Valve)
(a) When the compressor starts, SV1 is ON for 4 minutes, so check operation by whether the solenoid valve is
emitting an operating noise.
(b) Changes in the operating condition by solenoid valve operation can be confirmed by the temperature of the
bypass circuit and the sound of the refrigerant.
(c) SV1 goes ON in accordance with the rise in the high pressure in the cooling mode and heating mode, so check
its operation by the LED display and the operating noise emitted by the solenoid valve.
(Conditions during operation: See Control of Outdoor Unit.)
2) SV3 ~ 6 (Control of heat exchanger capacity)
(a) Operations can be confirmed by LED display and operating sound of solenoid valve, because one or more of
SV3 ~5 are turned on depending on conditions during cooling-only operations.
(b) Operation can be confirmed by LED display and operating sound of solenoid valve, because all of SV3 ~ 5 are
turned on during heating-only operations.
(c) Operations can be confirmed by LED display and operating sound of solenoid valve, because one or more of
SV3 ~6 are turned on depending on conditions during cooling-principal and heating-principal operations.
SW1
LED
1 2 3 4 5 6 7 8 9 10
ON
1 2 3 4 5 6 7 8 9 10
ON
Comp
operation Comp
operation
SV1 SV3 SV4 SV5
52C1
lights
for normal
operation
(3)
1 2 3 4 5 6 7 8 9 10
ON SV6