Allied A96US2V - Integrated Control Diagnostic Codes (E105-E131)

507404-02Page 68 of 80 Issue 1448
Code Diagnostic Codes/Status of Equip-
ment
Action Required to Clear and Recover
E105 Device communication problem - No
other devices on RS BUS (Communi-
cating systems only)
Equipment is unable to communicate indicates numerous message
errors. In most cases errors are related to electrical noise. Make sure
high voltage power is separated from RSBus. Check for mis-wired and
/or loose connections between the stat, indoor unit and outdoor unit.
Check for a high voltage source of noise close to the system. Fault
clears after communication is restored.
E110 Low line voltage Line Voltage low (Voltage tower than nameplate rating). Check power
line voltage and correct. Alarm clears 5 seconds after fault recovered.
E111 Line voltage polarity reversed Reverse line power voltage wiring. System resumes normal operation 5
seconds after fault recovered.
E112 Ground not detected System shuts down. Provide proper earth ground. System resumes
normal operation 5 seconds after fault recovered.
E113 High line voltage Line Voltage high (Voltage higher than nameplate rating). Provide
power voltage within proper range. System resumes normal operation 5
seconds after fault recovered.
E114 Line voltage frequency out-of-range. No 60 Hertz power. Check voltage and line power frequency. Correct
voltage and frequency problems. System resumes normal operation 5
seconds after fault recovered.
E115 Low 24V 24 Volt Power high (Range is 18 to 30 Volts). Check and correct volt-
age. Check for additional power robbing equipment connected to
system. May require installation of larger VA transformer to be installed
in furnace/air handler. Clears after fault recovered.
E116 High 24V 24 Volt Power high (Range is 18 to 30 Volts) Check and correct voltage.
Check for proper line voltage (120V 240V etc) to equipment. Clears
when control senses proper voltage.
E117 Poor ground detected (Warning only) Provide proper grounding for unit. Check for proper earth ground to the
system. Warming only will clear 30 seconds after fault recovered
E120 Unresponsive device (Communicating
systems only)
Usually caused by delay in outdoor unit responding to indoor unit pol-
ing. Recycle power. Check all wiring connections. Cleared after unre-
sponsive device responds to any inquiry
E124 Active communicating thermostat sig-
nal missing for more than 3 minutes
(Communicating systems only).
Equipment lost communication with the thermostat. Check four wiring
connections, ohm wires, and cycle power at the thermostat. Alert stops
all services and waits for heartbeat message from thermostat (subnet
controller). Cleared after valid thermostat (subnet) message is received.
E125 Control failed self-check, internal
error, failed hardware. Will restart
if error recovers, Integrated control
not communicating Covers hardware
errors (ame sense circuit faults, pin
shorts, etc)
Hardware problem on the control. Cycle power on control. Replace if
problem prevents service and is persistent. Cleared 300 seconds after
fault recovered.
E126 Control internal communication prob-
lem
Hardware problem on the control. Cycle power on control. Replace if
problem prevents service and is persistent. Cleared 300 seconds after
fault recovered.
E131 Corrupted control parameters (Verify
conguration of system) (Communi-
cating systems only).
Recongure the system. Replace control if heating or cooling is not
available. Only applicable in the communicating mode not in startup.
Exit from Commissioning and Execute Se+ factory Default mode. Con-
trol will still operate on default parameter settings.
Integrated Control Diagnostic Modes (Continued)