SSZ14 - Outdoor Unit Not Running

Goodman Heat Pump: ASZ / SSZ14

Re: Outdoor Unit Not Running

CHECKOUT

1. Check High Voltage

Open the outdoor unit control cabinet.
Check for 200 - 240VAC on the inlet side of the compressor contactor.
- No or Low Voltage ⇒ Check Power at Disconnect & Breaker Panel
Check to see if the compressor contactor is pulled-in.
- Not Pulled-In → Step 3. Check Low Voltage
- Pulled-In ⇒ Continue
Check for 200 - 240VAC on the leaving side of the compressor contactor.
- Contactor Pulled-In + No or Low Voltage = Bad Contactor
- Power Present + No Operation → Step 2. Check Capacitor

2. Check Capacitor

Break power to the outdoor unit by pulling the service disconnect or turning off the breaker.
Remove wires from "C" and "HERM" of the capacitor.
Move Meter leads to COM and MFD.
Set Meter to 200 MFD.
Place one lead on capacitor "C" and the other on capacitor terminal "HERM"
Confirm MFD reading with capacitor rating.
- Less than 80% of rating = Bad Capacitor
SWITCH METER LEADS BACK TO COM AND V BEFORE PROCEEDING!

3. Check Low Voltage

At the outdoor unit low voltage connections, check for 24VAC between (R) "Red" and (C) "Blue".
- No Power = Blown Low Voltage Fuse or No Air Handler Power
Check for 24VAC between (Y) "BL/PK" and (C) "Blue".
- No Power = No call from the thermostat ⇒ Recheck thermostat and look for a condensate overflow switch at the air handler.
Check for 24VAC at the compressor contactor coil "YL/PK" and "Blue".
- No Power at Contactor + Power on "Y" (BL/PK) = Open Safety → Step 4. Check Safeties
- Power at Contactor + Contactor Not Pulled-In = Bad Contactor

4. Check Safeties

At the wire-nut splice, check for 24VAC between "BL/PK ⇔ YL/PK" and "Blue".
- No Power = Open Hi Pressure Switch
- Power Present ⇒ Continue
At the compressor contactor, check for 24VAC between "YL/PK" and "Blue".
- No Power = Open Low Pressure Switch
- Power Present + Contactor Not Pulled-In = Bad Contactor