66
14
Troubleshooting
Diagnostic Procedure for Check Code
66
Check code
Operation cause
1. Pd sensor error
2. Service valve closed
3. Outdoor fan, capacitor error
[22]
4. Indoor/Outdoor PMV blockage
High-pressure protective operation
5. Outdoor heat exchanger blockage
6. SV2 circuit blockage
7. Communication error between indoor and
outdoor units
Is the high-pressure sensor
characteristics normal
?
Are the connections for the
capacitor and fan motor normal
?
Is service valve fully open
?
Does the outdoor fan operate
?
Refrigerant over charge
Blockage
Pipe breakage
Abnormal overload
Remove cause.
Open service valve fully.
Check outdoor interface P.C. board.
If defective, replace.
Repair defective part.
Repair SV2 bypass circuit.
(Coil error, disconnection of
wiring etc.)
No
Yes
No
Yes
No
Yes
No
Yes
Is there a problem with the
outdoor unit heat exchanger
?
➀
Blockage of heat exchanger
➁
Short circuit
Yes
No
Is SV2 bypass circuit normal
?
No
Yes
Check parts.
If defective, replace.
Содержание MM-A0160HX
Страница 1: ...Service Manual Air Conditioner Multi Split Type System Modular Multi System HFCR407C A90 0130 ...
Страница 2: ......
Страница 123: ...124 19 Exploded Views and Service Parts Outdoor Units MM A0280HT MM A0280HX MM A0224HT MM A0224HX ...
Страница 133: ...134 20 Additional Literature and Contacts ...
Страница 134: ...135 20 Additional Literature and Contacts ...
Страница 135: ...TOSHIBA AIR CONDITIONING www toshiba aircon co uk MADE IN UK A90 0130 Revised April 2001 ...