McQuay MWM Service Manual page 69

MCQUAY Service Guide Book
G17 – Inverter Y Models
Temperature
Display Section
Diagnosis Step
1. Hold down TIMER CANCEL button for 5 seconds, a "
display section.
2. Press TIMER CANCEL repeatedly until indoor buzzer produces a long beep. This indicates the error
code, refers to Error Codes table and is displayed on the temperature display section.
3. A short beep or two consecutive beeps indicate non-corresponding error codes.
4. To cancel the error code display, hold down TIMER CANCEL button for 5 seconds. Alternatively, the
code display will cancel itself if the button is not pressed for 1 minute.
Error Code Diagnosis by Unit Last State Memory
(A) Wireless Handset G17
1. Remove battery from remote controller
2. Replace battery again into remote controller
3. Press Mode & ON/OFF buttons together
4. Press Mode button to 5:00
5. Press ON/OFF once
6. Repeat the fault diagnosis steps
(B) Wired Handset Netware3C
1. Press SLEEP and TIMER ACTIVE buttons together for 5s
2. Panel will blink LED twice and beep buzzer
3. If there is an error code, Minutes column "
shown on the right of fan speed indicator area for 60s before return to normal operation
4. During this 60s, the interval keypad will be locked
5. However, user is allowed to terminate this waiting state by pressing SLEEP and TIMER ACTIVE
buttons again for 5s or simply pressing ON/OFF button.
MODE Button
TIMER CANCEL Button
OFF TIMER Button
" indication flashes on the temperature
" will be replace by blinking "Er" and error code will be
68
Diagnosis