Johnson Controls ZY Series - Page 103

Table 58: Fault Codes
SR. No. Condition Red LED Green LED
21
Fan only (No
heat/cool)
Off Fast heartbeat
22
No alarms
in memory
2 pulses 2 pulses
23 Normal idle Off Slow heartbeat
24 Factory test mode Rapid flash Rapid flash
Push Button
Hold down for:
• 0 to 2 seconds: 5 most recent error codes in
the history will flash on the LEDs
• 2 to 5 seconds: clear anti-short cycle timers
and reset any active lockouts
• > 5 seconds: clear all fault history
INSTALLATION MANUAL ZY SERIES 3-10ton 60 Hertz R-410A 103
Johnson Controls Ducted Systems