PTAC
Re: DIAGNOSTIC CODES
OPERATING MODES | ||
Code | Status | Suggested Action |
FP | Freeze Protection engaged | None |
Fd | Front Desk switch is closed | Open Front Desk switch |
Eo | Un-Configured Board | Enter configuration menu |
EH | Emergency Hydronic engaged | Open front emergency hydronic switch |
LS | Load Shedding engaged | Open load shedding switch |
On | Configured for Wired Stat | None |
oP | Open Door Lockout | Close room door switch |
nP | Window Switch Lockout | Close door or window switch |
hP | Heat Sentinel | Room temperature too high |
Ur | Un-Rented Status | Front-desk need to set to Rented mode. |
FAILURES | ||
Code | Status | Suggested Action |
F1 | Indoor sensor out of range | Replace Black indoor thermistor |
F2 | Wireless Remote Thermostat failure | Replace wireless thermostat |
F3 | Indoor sensor out of range | Replace Black indoor thermistor |
F4 | Indoor Coil sensor out of range | Replace Red indoor coil thermistor |
F5 | Wireless Thermostat failure | Attempt to rebind Wireless Thermostat or Replace Wireless Thermostat |
F6 | Indoor Discharge sensor out of range | Replace Yellow Discharge thermistor |
Fb | Low Remote Battery | Replace batteries in wireless device |
H1 | High Voltage Protection | Check incoming power |
br | Brown Out Protection | Check incoming power |
AIRFLOW ALERTS | ||
Code | Status | Suggested Action |
L6 | Discharge air too hot | Clean filter or remove air blockage |
LC | Outdoor coil temp high | Clean condenser coil, check for fan fault |
C2 | Too much temp drop | Clean filter, remove air blockage, close vent door |
C5 | Outdoor coil temp too high for ambient temp | Check for blocked outdoor air, clean coil |
REFRIGERATION ALERTS | ||
Code | Status | Suggested Action |
C1 | Indoor coil too cold | Clean filter, check fan, check charge |
C4 | Indoor coil froze-up | Clean filter, check fan, check charge |
C6 | Poor unit performance | Check blower, compressor & heaters |
C7 | ICT - IAT > 20 (+ 10 min) | Clean filter, check fan, check charge |