Fault Codes; Remote Controller - Toshiba MAR - M81HTM8 - E Service Manual

TOSHIBA

Fault Codes

Before reading the fault codes do not turn the power off as doing so will wipe the diagnostic
memory. Caution must be taken when removing the access covers as high voltages are present.
Fault diagnosis is available at three locations within the air conditioning system :-
1. Remote Controller - press the check button
2. Multi Controller - rotate the display switch to position 1
3. Outdoor Unit - see following text

Remote Controller

Press Check
O4 No Communication
Inverter to Interface
O4 No Communication
Multi Con to Outdoor
O4 No Communication
Indoor to Multi Con
Ob I.D. Water Level
OC TA Sensor
Od TC Sensor
O8 Reverse Change Temp
O9 Frost or no Change ºC
99 No Communication
Indoor to Rem Con.
15 Refer to Multi Con
Preheat/Defrost Flash
1C Refer to O/D
14 Refer to O/D
1d Refer to O/D
1F Refer to O/D
18 Refer to O/D
21 Refer to O/D
-
= LED Flashing
AUGUST 1997
6. Fault Code and Display Information
Multi Controller
Switch Position 1
è
O4 No Communication
Inverter to Interface
è
O4 No Communication Multi
Con to Outdoor
88 No Communication
Initially M/C to OD
80 Th(A) Sensor Fault
81 Th(B) Sensor Fault
82 Th(C) Sensor Fault
83 Th(D) Sensor Fault
84 Th(X) Sensor Fault
ì
Ob M/C Water Level
è
89 ID Codes too High
ID Codes set to Zero
è
1C Refer to O/D
è
14 Refer to O/D
è
1d Refer to O/D
è
1F Refer to O/D
è
18 Refer to O/D
è
21 Refer To O/D
m
= LED On
è
see Table 1
Display Switch set to "8" (if lit....)
ç
LED1
ç
LED2
ç
LED3
ç
LED4
ç
LED5
ç
ç
LED6
LED7
LED8
Display Switch set to "3" (if lit....)
è
LED1
LED2
LED3
LED4
LED5
LED6
LED7
LED8
SW01 Set to Off/Off
è -mmm
è m-mm
è mm-m
è
è mmm-
î
Page 13
Outdoor Unit
No Communication Inverter to Interface
Th(A) Sensor Fault
Th(B) Sensor Fault
Th(C) Sensor Fault
Th(D) Sensor Fault
Th(X) Sensor Fault
M/C Water Level
M/C Settings too High
M/C1 Sensor Fault
M/C2 Sensor Fault
ThD1 Sensor Fault
ThD2 Sensor Fault
ThS Sensor Fault
High Pressure - detected by pressure
sensor
Pressure Sensor Fault
Discharge Pipe >130ºC
Suction Pipe >40ºC
Low Pressure <3.5psig
Low Inverter Voltage
High Inverter Current dc
High Inverter Current ac
ThE Sensor Fault
Inv HP Trip, Comp Klixon
Phase Rotation, DOL HP Trip, O/Load,
Comp Klixon