Mitsubishi Electric CITY MULTI PUHY-P400YEM-A Service Handbook page 181

1
Variable capacity unit (SW4-2 OFF)
No SW1 Item
12345678910
0 0000000000 Relay Output
Display 1 (Light up
to display)
Check Display 1
OC Error
1 1000000000 Relay Output
Display 2
2 0100000000 Check Display 2
(Also includes IC)
3 1100000000
4 0010000000 Special Control
5 1010000000 Communication
Demand Volume
6 0110000000 External Signal
7 1110000000 Outdoor Unit
Operation Display
8 0001000000 Indoor Unit Check
9 1001000000
10 0101000000 Indoor Unit
Operation Mode
11 1101000000
12 0011000000 Indoor Unit
Thermostat
13 1011000000
14 0111000000
15 1111000000 Outdoor Unit
Operation Mode
16 0000100000 Outdoor Unit
Control Mode
17 1000100000 Error Delay in
Outdoor Unit
18 0100100000
19 1100100000
20 0010100000
LD1 LD2 LD3 LD4
COMP COMP1 52C2 21S4a
Operating Operating
(Address and error code reversed)
SV4 21S4b SV5b SV6
(Address and error code reversed)
PUHN 4way
valve control.
Confir med Liquid Liquid Liquid
refrigerant correc- correc- correc-
1 2
overcharge tion tion tion
ON/OFF Night Snow Auto
Demand Mode Sensor change
over
mode
(Cooling)
Warm- 3- Compres-
SV7
up minute, sor
Mode restart Operating
Unit Unit Unit Unit
No. 1 No. 2 No. 3 No. 4
Unit Unit Unit Unit
No. 9 No. 10 No. 11 No. 12
Unit Unit Unit Unit
No. 1 No. 2 No. 3 No. 4
Unit Unit Unit Unit
No. 9 No. 10 No. 11 No. 12
Unit Unit Unit Unit
No. 1 No. 2 No. 3 No. 4
Unit Unit Unit Unit
No. 9 No. 10 No. 11 No. 12
Permis- Standby Cooling
sion
Initial Cooling Heating Defrost
Operation Refrigerant Refrigerant
Recovery Recovery
High Low No. 1
Pressure — Pressure Discharge
Error 1, 2 Error Tempera-
ture Error
Overcurrent INV Refrigerant Configration
Break Error Over- Detection
charge Error
TH11 TH12 TH2 TH3
Error Error Error Error
TH8 TH9a TH9b TH10c
Error Error Error Error
-178-
Display
LD5 LD6 LD7
SV1 SV 22/
32
0000 ~ 9999
CH2, 3 52F Retry
Operation
0000 ~ 9999
Liquid Liquid Liquid
correc- correc- correc-
3 4 5 6
tion tion tion
0000 ~ 9999
Auto
change
over
mode
(Heating)
Prelimi- Error SV8
nary
Error
Unit Unit Unit
No. 5 No. 6 No. 7
Unit Unit Unit
No. 13 No.14 No. 15
Unit Unit Unit
No. 5 No. 6 No. 7
Unit Unit Unit
No. 13 No.14 No. 15
Unit Unit Unit
No. 5 No. 6 No. 7
Unit Unit Unit
No. 13 No.14 No. 15
Heating
Balance Cooling
Oil Low Oil
Recovery
No. 2 No. 1 No. 2
Discharge Over- Over-
Tempera- current current
ture Error Protection Protection
Oil TH10a TH10b
Tempera- Error Error
ture Error
TH4 TH5 TH6
Error Error Error
Pressure THHS
Sensor Error
Error
Remarks
LD8
Lights for LD8 is a relay output
Normal indicator which lights
Operation up at all times when
the microcomputer's
power is ON. LD8 is
determined as the re-
verse of CH11.
Emergency
Operation
If there is no error,
"- - - -" is displayed.
Liquid
correc-
7
tion
"- - - -" if there is no
demand control.
Packet
Being
Sent
Unit Lights up if an abnormal stop
No. 8 has occurred in the IC. The in-
dicator for Unit No. 1 goes off
Unit when error reset is carried out
No. 16 from the smallest address. Af-
ter No.17 unit, No.264 and 265.
Unit Lights up during
No. 8 cooling.
Blinks during heating.
Unit Goes off during stop
No. 16 and blower operation.
After No. 17 unit, No.
266 and 267.
Lights up when
Unit
thermostat is ON.
No. 8
Goes off when
thermostat is OFF.
Unit
After No. 17 unit, No.
No. 16
268 and 269.
De-
mand
Heat Sink The flag correspond-
Thermo- ing to the item where
stat there is an error delay
Operating lights up.
Only the [Super Y]
setting is valid for
TH10a and TH10b.
TH7
Error