Troubleshooting By 7-Segment Display - Hisense Hi-FLEXi S Series Technical, Installation, Maintenance

1.2.4 Troubleshooting by 7-Segment Display

Only the authorized person can check with this method. Operating conditions and each part of refrigeration cycle can be
checked by 7-segment and push switches on the PCB in the outdoor unit.
(1) Before Checking
(a) Turn ON main power supply. Wait for more than 20 seconds to start checking.
(b) Checking ltems
* Connecting Information
* Outdoor Unit Information
* Indoor Unit Information
* Cause of Alarm Code Information
* Alarm Code History Information
(c) Check the location of 7-segment and push switches.
High voltage is applied to PCB and electrical parts. Never touch electrical
(2) Location of Push Switches and 7-Segment Display The push switches and 7-segment display are located on the
outdoor unit PCB.
PSW2
PSW5
7-Segment
Display
PSW1
PSW4
Mark
CH Contactor of Relay (Y
1
CH Contactor of Relay (Y
2
20A Contactor of Relay (Y
1
20A
2
21 Contactor of Relay (Y
1
21 Contactor of Relay (Y
2
FAN
20B
20C
20F Contactor of Relay (Y
1
20F Contactor of Relay (Y
2
20CHG
X Contactor of Relay (Y
1
X
2
parts and wires when checking.
PSW3
SEG2
O.U. PCB
Description of Mark
) on O.U. PCB for Crankcase Heater
CH1
) on O.U. PCB for Crankcase Heater
CH2
) on O.U. PCB for Solenoid Valve
20A1
) on O.U. PCB for Reversing Valve
211
) on O.U. PCB for Reversing Valve
212
) on O.U. PCB for Solenoid Valve
20F1
) on O.U. PCB for Solenoid Valve
20F2
) on O.U. PCB for Solenoid Valve
X1
SEG1
-
-
-
-
-
-
193
Troubleshooting
X1
212
20A1
20F1
20F2 211 CH2 CH1
Fan
Parts Mark in Wiring Diagram
CH1
CH2
SVA
-
RVR1
RVR2
-
-
-
-
-
-
SVG
-