The breaker on the bottom right (with the green tab on it) looks tripped. They will move to center position without doing much else. Turn it all the way off and then all the way back on.
If that does not work: turn ALL your breakers all the way off and then all the way on to make sure all are reset. Then look for gfci receptacles and make sure to reset all you can find.
You'll need a double-pole GFCI breaker, wired like so:
What you have described is a multiwire branch circuit. Because the neutral is shared, the overcurrent protection device(s) (in your case the two separate breakers) must be able to trip together.
This can be remedied by installing a double-pole breaker, or by handle-tying two individual breakers. However, since you already have a need for GFCI protection, go ahead and install a double pole GFCI breaker.
However, existing lights might not need GFCI protection if they are 5 ft or more away from the pool (horizontally) and 5 ft or more above the maximum water level of the pool. Within 5 ft and below 5 ft above the maximum water level is not allowed. See (B)(3) and (4).
If you move or install new lights, they are subject to new installation requirements. See (B)(1).
2014 NEC
680.22 Lighting, Receptacles, and Equipment.
(B) Luminaires, Lighting Outlets, and Ceiling-Suspended
(Paddle) Fans.
(1) New Outdoor Installation Clearances. In outdoor pool areas,
luminaires, lighting outlets, and ceiling-suspended (paddle) fans
installed above the pool or the area extending
1.5 m (5 ft) horizontally from the inside walls of the pool shall be installed at a height not less than 3.7 m (12 ft) above the maximum
water level of the pool.
(3) Existing Installations. Existing luminaires and lighting outlets
located less than 1.5 m (5 ft) measured horizontally from the inside
walls of a pool shall be not less than 1.5 m (5 ft) above the surface
of the maximum water level, shall be rigidly attached to the existing
structure, and shall be protected by a ground-fault circuit
interrupter.
(4) GFCI Protection in Adjacent Areas. Luminaries, lighting outlets, and ceiling -suspended (paddle) fans installed in the area extending between 1.5 m (5 ft) and 3.0 m (10 ft) horizontally
from the inside walls of a pool shall be protected by a ground-fault
circuit interrupter unless installed not less than 1.5 m (5 ft) above
the maximum water level and rigidly attached to the structure adjacent
to or enclosing the pool.
Best Answer
The surface burner controllers on electric ranges work by making and breaking the circuit to the heating element. I don't know the frequency at which this occurs, but this mode of operation would appear to have the potential to trigger an arc fault breaker or receptacle. See https://en.wikipedia.org/wiki/Energy_regulator
Therefore, some ranges might trip some AFCI breakers or receptacles. Is AFCI protection appropriate for a kitchen? I thought AFCI was for bedrooms.
Frigidaire is a name brand of range so I would first suspect the AFCI receptacle or breaker. What is the type (receptacle or breaker) and brand of AFCI device you have in the kitchen circuits of these apartments?