Maytag Amana PMH Series Service And Troubleshooting page 36

SERVICING
Code Laymanized Cause
A1 Alarm
br Brown out
C1 Hyd coil freeze protection IDT < 35
C2 Indoor recirculation
C3 Refrigeration issue
C4 Frozen ID coil
C5 Outdoor recirculation
C6 Low Delta T
C7 Frozen ID coil
DC Motor Control Issue Communication loss to DC motor control
d4
OD DC Motor Issue
d5
d6 DC Motor Issue
Ec Relay Configuration Error (P3), (P4), (P5), or (P6) configured incorrectly
Emergency. Hydronic
EH
Service Board
Eo
F- IAT on OD RH Sensor bad Temp thermistor on indoor humidity sensor bad
F0 One or more bad thermistorsLine Diagnostic Only; all thermistors not close on 1st sta Check all Thermistor temps soaked in ambient.
IAT Sensor bad
F1
T-stat Sensor bad
F2
IAT Sensor bad
F3
ICT Sensor bad
F4
F5 DS01* signal loss
IDT Sensor bad
F6
OCT Sensor bad
F7
OAT Sensor bad
F8
IHD Sensor bad
F9
FA DigiAir suction cold
Fb Low Battery
Technical Cause
Switch is closed on IN1 or IN2
Transformer secondary < 19Vac
│IAT -RIAT │ > (J4) (> 2 minutes of blower)
2 2
If ICT > 65 & <75; & IAT <77;│ICT
0 0
L3 error + IAT > (J6)
OAT > (J7)
OCT
7- 7
IAT -IDT <10, & OAT > 50 & < 90
7 7
ICT -IAT >20
10 10
OD DC motor not within 35% of expected RPM
ID DC motor not within 35% of expected RPM
Emergency hydronic switch is closed on IN1 or IN2
(C3) has been set to "0" for service board
IAT < -20, or > 150, or open, or shorted (no RIAT)
RIAT < -20, or > 130, or open, or shorted
IAT < -20, or > 150, or open, or shorted (RIAT good)
ICT < -20, or > 200, or open, or shorted
Signal to wireless thermostat lost for > 15 min.
IDT < -20, or > 233, or open, or shorted
OCT < -20, or > 200, or open, or shorted
OAT < -20, or > 200, or open, or shorted
IHD < -20, or > 233, or open, or shorted
DST<20
Batter Volt < 2.2V in any wireless device
Normal, check switch, check (u8) & (u9)
Check outlet, check 24V board power supply
Clean Filter, Evap, or remove blockage
Clean Filter, Evap, or remove blockage
Check Filter, Fan, Refrigerant, Cap tube.
-ICT │ > (J5)
7 0
Check Fan Op., Refrigerant, Cap tube
Check for blocked Outdoor coil / Recirculation
Check compressor, fan, & heater Op.
Check Fan Op., Refrigerant, Cap tube
Check cable, check motor control & motors
Check motor control, replace OD motor
Check motor control, replace ID motor
Check configurations; cycle power
Normal, open switch, check switch, check (u8) & (u9
Configure C3 configuration point for C or H
Ignore or replace RH Sensor
Replace Thermistor
Replace Thermostat
Replace Thermistor
Replace Thermistor
Re-bind, Replace Wireless Thermostat
Replace Thermistor
Normal Op. for PTC w/o DT01*, Replace as needed
Normal Op. w/o DT01*, Replace as needed
Normal Op. w/o DT01*, Replace as needed
Check kit filter, & kit for air blockage
Replace Batteries
Suggested Actions
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